2. Light through a lens 5/11/15 5/11Affect of lenses on light TB p. 567 #1-6 5/12Affect of lenses on light TB p. 567 #7-12 (last week groups didn’t finish) 5/13Ray Diagrams TB p. 570-571 CN HW: TB p. 571 #1-3 5/14Essential Questions TB p 573 HW: TB p. 575 #8,10,12 5/15 Quiz

3. Date: 5/11Objective: I can observe real images formed by a convex lens. Bell Ringer: A certain FM radio station broadcasts electromagnetic waves at a frequency of 9.05x10 7 Hz. These radio waves travel at a speed of 3.00x10 8 m/s. What is the wavelength of these radio waves? Include correct Units in your answer.

4. Date: 5/11Objective: I can observe real images formed by a convex lens. TB p. 567

5. Date: 5/11Objective: I can observe real images formed by a convex lens. With your group, complete TB p. 567 #1-6 Member #1 positions lens and measures for #3,5 Member #2 reads directions for #1-3 Member #3 set up and measures #4,6 Member #4 reads directions for #4-6 All members write results

6. Date: 5/12Objective: I can observe real images formed by a convex lens. Bell ringer: 1. Identify the parts of the the wave A-E 2. What is the amplitude of the wave? 3. What is the wavelength of the wave? A D B C E

7. Period 3 Home work tonight: Read TB p 570-571 and take CN TB p 571 #1-3

8. Date: 5/13Objective: I can relate image size and position to object size and position Bell ringer: What will the representation of a periodic wave look like, with an amplitude of.03m and a wavelength of.06m? Show the periodic wave below

9. Date: 5/12Objective: I can relate image size and position to object size and position Get one textbook for each table Open to page 570

10. Date: 5/12Objective: I can relate image size and position to object size and position Get one textbook for each table Open to page 570 Independently read TB p 570-571 and take CN

11. Date: 5/12Objective: I can relate image size and position to object size and position Get one textbook for each table Open to page 570 Independently read TB p 570-571 and take CN HW: TB p. 571 #1-3

12. If parallel rays (say, from a distant source) pass through the lens, then a converging lens will bring the rays to an approximate focus at some point behind the lens. The distance between the lens and the focus of parallel rays is called the focal length of the lens 1/f=1/do+1/di

14. Date: 5/14Objective: I can relate image size and position to object size and position Bell ringer: Sound travels as a compressional wave with compressions and rarefactions as seen below. This sound is traveling through a different gas then air. The distance between compressions is 1.8m and the frequency of the sound is 750 Hz. What is the speed of sound traveling through this medium? 1.8m

16. Date: 5/14Objective: I can relate image size and position to object size and position In your notebook, create a ray diagram of the image formed by The lens below 2f f f

17. Date: 5/14Objective: I can relate image size and position to object size and position In your notebook, create a ray diagram of the image formed by The lens below 2f f f

18. Date: 5/14Objective: I can relate image size and position to object size and position In your notebook, create a ray diagram of the image formed by The lens below 2f f f

19. Date: 5/14Objective: I can relate image size and position to object size and position In your notebook, create a ray diagram of the image formed by The lens below 2f f f

20. Date: 5/14Objective: I can relate image size and position to object size and position In your notebook, create a ray diagram of the image formed by The lens below 2f f f

21. Date: 5/14Objective: I can relate image size and position to object size and position In your notebook, create a ray diagram of the image formed by The lens below 2f f f

22. Date: 5/14Objective: I can relate image size and position to object size and position One textbook per table

23. Date: 5/14Objective: I can relate image size and position to object size and position One textbook per table Open to page 573 With your shoulder partner complete the Essential Questions

24. Date: 5/14Objective: I can relate image size and position to object size and position Practice #1 What will happen to both of the rays?

25. Date: 5/14Objective: I can relate image size and position to object size and position Practice #2 What will happen to both of the rays?

26. Date: 5/14Objective: I can relate image size and position to object size and position Practice #3 How are the angle of incidence and emergent related?

27. Date: 5/14Objective: I can relate image size and position to object size and position Practice #4 critical angle?

28. Date: 5/14Objective: I can relate image size and position to object size and position Quiz tomorrow Refraction- light bends as it travels from one medium to another - what happens if air to glass? - what happens if from glass to air - What happens in other medium - what are the connection in angles as light travels through the box - critical angle – when the angle of refraction is 90 degrees - what happens to the light - index of refraction Lenses- Ray diagram- Draw ray diagram and explain the orientation of the image location, size, and real or virtual - principal axis, focal point, 2f -image size- how do you change image size with a convex lens - how to produce the same size image - real vs virtual image

29. Date: 5/15Objective: I can relate image size and position to object size and position Bell Ringer: If a wave pass a point and completes 15 cycles in 4 seconds, what is the frequency of the wave?

30. Date: 5/15Objective: I can relate image size and position to object size and position TB page 573

31. Date: 5/15Objective: I can relate image size and position to object size and position Independently complete the essential question on TB page 573

32. Date: 5/12Objective: I can observe real images formed by a convex lens. With your group, complete TB p. 568 #4-12 Member #1 positions lens and measures for #5,7,9,11 Member #2 reads directions for #4,6,8,10,12 Member #3 set up and measures #4,6,8,10,12 Member #4 reads directions for #8-12 All members write results

37. Date: 5/11Objective: I can observe real images formed by a convex lens. A dog whistle is designed to produce a sound with a frequency beyond that which can be heard by humans (between 20 000 Hz and 27 000 Hz). If a particular whistle produces a sound with a frequency of 2.5 × 104 Hz, what is the sound’s wavelength? (Assume the speed of sound in air is 331 m/s.) The lowest pitch that the average human can hear has a frequency of 20.0 Hz. If sound with this frequency travels through air with a speed of 331 m/s, what is its wavelength? A 10.0 m wire is hung from a high ceiling and held tightly below by a large mass. Standing waves are created in the wire by air currents that pass over the wire, setting it in motion. If the speed of the standing wave is 335 m/s and its frequency is 67 Hz, what is its wavelength?

38. Date: 5/4Objective: I can investigate the refraction of light. Textbook page 558

39. Date: 5/4Objective: I can investigate the refraction of light. With your group, complete TB p. 558 #1-10 Member #1 positions mirror and laser for #1,3,5,7,9 Member #2 reads directions for #1,3,5,7,9 Member #3 positions mirror and laser for #2,4,6,8,10 Member #4 reads directions for #2,4,6,8,10 All members write results Be careful with the lasers. DO NOT DIRECT the lasers near anyone’s eyes! Point lasers towards windows and door

40. Date: 5/5Objective: I can investigate the refraction of light. Bell Ringer: #10 and 11

41. Date: 5/5Objective: I can investigate the refraction of light. Bell Ringer: #12 and 13

42. Date: 5/5Objective: I can investigate the refraction of light. Textbook page 558

43. Date: 5/5Objective: I can investigate the refraction of light. With your group, complete TB p. 558 #1-10 Member #1 positions mirror and laser for #1,3,5,7,9 Member #2 reads directions for #1,3,5,7,9 Member #3 positions mirror and laser for #2,4,6,8,10 Member #4 reads directions for #2,4,6,8,10 All members write results Be careful with the lasers. DO NOT DIRECT the lasers near anyone’s eyes! Point lasers towards windows and door

44. Date: 5/5Objective: I can review the reflection of light. Independently complete Workbook page 200 and 206

45. Date: 5/6Objective: I can investigate the refraction of light. Bell Ringer: #10 and 11

46. Date: 5/6Objective: I can investigate the refraction of light. Bell Ringer: #12 and 13

47. Date: 5/6Objective: I can investigate the refraction of light. Textbook page 558

48. Date: 5/6Objective: I can investigate the refraction of light. With your group, complete TB p. 558 #1-10 Member #1 positions mirror and laser for #1,3,5,7,9 Member #2 reads directions for #1,3,5,7,9 Member #3 positions mirror and laser for #2,4,6,8,10 Member #4 reads directions for #2,4,6,8,10 All members write results Be careful with the lasers. DO NOT DIRECT the lasers near anyone’s eyes! Point lasers towards windows and door

49. Date: 5/7Objective: I can investigate the refraction of light. With your group, complete TB p. 558 #1-10 Member #1 positions mirror and laser for #1,3,5,7,9 Member #2 reads directions for #1,3,5,7,9 Member #3 positions mirror and laser for #2,4,6,8,10 Member #4 reads directions for #2,4,6,8,10 All members write results Be careful with the lasers. DO NOT DIRECT the lasers near anyone’s eyes! Point lasers towards windows and door

50. Date: 5/8Objective: I can investigate the refraction of light. Bell Ringer: Draw a picture of what you observed when the laser was pointed at the acrylic block?

51. Date: 5/8Objective: I can investigate the refraction of light. TB p 561-562

52. Date: 5/8Objective: I can investigate the refraction of light. Independently read TB p 561-562 and take cornell notes

53. Date: 5/8Objective: I can investigate the refraction of light. Bell Ringer: Draw a picture of what you observed when the laser was pointed at the acrylic block?

54. Date: 5/8Objective: I can investigate the refraction of light. Independently read TB p 561-562 and take cornell notes Complete HW: TB p. 562 #1-3

55. Date: 5/8Objective: I can investigate the refraction of light. Independently read TB p 561-562 and take cornell notes review

56. Date: 5/8Objective: I can investigate the refraction of light. Complete WB p 211 -212 Complete HW: TB p. 562 #1-3

57. Date: 5/8Objective: I can investigate the refraction of light. Complete WB p 211 -212

58. Date: 5/8Objective: I can investigate the refraction of light. Explore the refraction of light? Shine the 3 light laser at each of the different shapes. Draw your predicted result. Test your result

59. Date: 5/8Objective: I can investigate the refraction of light. Explore the refraction of light? Combine shapes together to make the most creative design

62. Date: 5/8Objective: I can investigate the refraction of light. video

63. Date: 4/27Objective: I can understand characteristics of reflection Bell Ringer Use passage II to answer #8-9

64. Date: 4/27Objective: I can I can understand characteristics of reflection Video

65. Date: 4/28Objective: I can investigate the images from curved mirrors Independently Read Article Answer Questions on a separate piece of paper

66. Date: 4/29Objective: I can investigate the images from curved mirrors Bell Ringer: Use passage II to answer #10-11

67. Date: 4/27Objective: I can I can understand characteristics of reflection With your shoulder partner complete TB p. 543 #1,2,3 TB p. 546 #1,2,3,6,10

68. Date: 4/29Objective: I can investigate the images from curved mirrors Bell Ringer: Use passage II to answer #10-11

69. Date: 4/29Objective: I can investigate the images from curved mirrors With your group, complete TB p. 548

70. Date: 4/29Objective: I can investigate the images from curved mirrors With your group, complete TB p. 548 #1-17 Member #1 positions mirror and laser for #1,3,5,7,9,11,13,15,17 Member #2 reads directions for #1,3,5,7,9,11,13,15,17 Member #3 positions mirror and laser for #2,4,6,8,10,12,14,16 Member #4 reads directions for #2,4,6,8,10,12,14,16 All members write results Be careful with the lasers. DO NOT DIRECT the lasers near anyone’s eyes! Point lasers towards windows and door

71. Date: 4/30Objective: I can investigate the images from curved mirrors With your group, complete TB p. 548 #1-17 Member #1 positions mirror and laser for #1,3,5,7,9,11,13,15,17 Member #2 reads directions for #1,3,5,7,9,11,13,15,17 Member #3 positions mirror and laser for #2,4,6,8,10,12,14,16 Member #4 reads directions for #2,4,6,8,10,12,14,16 All members write results Be careful with the lasers. DO NOT DIRECT the lasers near anyone’s eyes! Point lasers towards windows and door

72. Date: 4/30Objective: I can investigate the images from curved mirrors Independently read TB p. 551-552 and take Cornell notes 10 min

73. Date: 4/30Objective: I can investigate the images from curved mirrors Independently read TB p. 551-552 and take Cornell notes 10 min HW: TB p. 552 #1-3

74. Date: 4/30Objective: I can investigate the images from curved mirrors Independently read TB p. 551 and take Cornell notes Discuss reading

75. Date: 5/1Objective: I can understand how light is reflected from curved mirrors Independently complete Essential Questions TB p 554

76. Date: 5/1Objective: I can understand how light is reflected from curved mirrors Independently complete Essential Questions TB p 554 Share with your shoulder partner

77. Date: 5/1Objective: I can understand how light is reflected from curved mirrors In a convex mirror, what happens to your image?

78. What is reflection? Reflection is when any wave bounces off a surface and changes direction. Water waves, slinky waves, sound waves, and light waves can all be reflected.

79. What is a ray?  To make light waves easier to represent when talking about reflection, we use a ray system to describe them.  A ray is an individual beam of light.  Objects that produce light create an infinite number of rays in ALL directions.  Rays travel in straight lines.

80. What is a ray?  In this class, we model individual rays with laser pointers, because they produce straight beams of light (and they’re inexpensive).  NEVER POINT A LASER INTO ANOTHER STUDENT’S EYE.  THIS CAN CAUSE PERMANENT BLINDNESS.  THIS IS A SUSPENDABLE OFFENSE. NO JOKING AROUND!

81. What is a ray?  Observe this animation of a ray striking a mirror.  We call a ray that strikes a surface the incident ray.  The direction an incident ray strikes a mirror depends on an imaginary line called a normal. Incident ray Normal Mirro r

82. What is a normal? Remember – a normal is imaginary, but it follows certain rules. The normal MUST make a perfect 90° angle with the mirror surface. The normal MUST be drawn where the incident ray strikes the mirror surface. Normals should be drawn as a dashed line, NOT a solid line.

83. Sample #1

84. 1. Place the hole in your protractor where the incident ray strikes the mirror, and line it up with the mirror itself.

85. Sample #1 2. Make a mark on your paper at the 90° point on your protractor. 90 °

86. Sample #1 3. Use your protractor to draw a dashed line from the mirror to the mark you made.

87. Sample #1 4. Label the mirror, incident ray, and normal for each sample. Mirror Incident Ray Normal

88. Sample #2

89. Sample #3

90. Sample #4

91. Measuring angles The angle a ray strikes a surface at is called the angle of incidence. As a variable, angle of incidence = θ i Mirror Incident Ray Normal

92. Measuring angles The angle of incidence is measured between the incident ray and the normal…NOT the mirror! Mirror Incident Ray Normal θiθi NOT HERE Angle of incidenc e

93. Measuring angles Place the hole of your protractor where the incident ray meets the normal, and turn the protractor so that it lines up with the normal. Mirror Incident Ray Normal θiθi

94. Measuring angles Count up from zero degrees until you reach the incident ray. Mirror Incident Ray Normal θ i = ?

95. Law of reflection Mirror Incident Ray Normal θiθi Rays reflect off a surface at the same angle they struck it with. This reflected angle is the angle of reflection. Reflected Ray Angle of incidenc e θrθr Angle of reflection

96. Law of reflection Mirror Incident Ray Normal θiθi The law of reflection shows that the two angles are the same. Reflected Ray Angle of incidenc e θrθr Angle of reflection

97. Image formation Mirror Images form ‘inside’ a mirror, NOT on its surface. Specifically, images form on the opposite side of the mirror’s surface. These are known as ‘virtual’ images. All reflected rays appear to come from an image. Object Image

98. Image formation Mirror Virtual images are located an equal distance from the mirror surface as the object, and are the same size. This is true for every point on the original object. The image’s SIZE is the same as that of the object. Object Image

99. Image formation Mirror Virtual images are located an equal distance from the mirror surface as the object, and are the same size. This is true for every point on the original object. The image’s SIZE is the same as that of the object. Object Image

100. Image formation Mirror Virtual images are located an equal distance from the mirror surface as the object, and are the same size. This is true for every point on the original object. The image’s SIZE is the same as that of the object. Object Image

101. Image formation Mirror Light from an object reflects off the mirror to your eye, according to the law of reflection. EyeObject Image

102. Image formation Mirror The reflected rays seem to diverge from the image. EyeObject Image

103. Image formation Mirror This is why we say that all reflected rays seem to come from the image. EyeObject Image

104. Image formation Mirror Although the position of the observer might change, the image location does not. Eye Object Image

105. Image formation Mirror Although the position of the observer might change, the image location does not. Eye Object Image

106. Curved Mirrors There are two different types of curved mirrors, based on what direction they curve in. – Concave mirrors curve inwards (like a cave). – Convex mirrors curve outwards. A metal spoon is both concave AND convex. – Liquids go in the concave part. – The back of the spoon is convex.

107. Concave mirrors

108. Convex mirrors

109. Curved mirrors Both types of curved mirrors must follow the law of reflection.

110. Curved mirrors Since the surface of the mirror curves, each normal changes in order to stay at a right angle to the surface.

111. Curved mirrors The law of reflection causes each reflected ray to converge on one point, known as the focal point. Focal Point

112. Concave mirrors This property is used in radar and satellite dishes. Even though these dishes aren’t reflective for VISIBLE light, they are highly reflective for radio waves.

113. Curved mirrors Convex mirrors behave similarly, but their focal point is on the virtual side of the mirror.

114. Curved mirrors Convex mirrors behave similarly, but their focal point is on the virtual side of the mirror. Focal Point

115. Convex mirrors Convex mirrors are good at reflecting light around corners, seeing more of a room, and keeping images rightside-up. For this reason, most security mirrors are convex.

116. Properties of Curved Mirrors Concave Mirrors Can produce images either BIGGER or SMALLER than the object, depending on where the object is. – Producing larger images is known as magnification. Can produce images rightside- up OR upside-down, depending on where the object is. – ‘Upside-down’ is known as inverted. Convex Mirrors Can only produce images SMALLER than that of the object, regardless of where the object is. Can only produce images that are rightside-up, regardless of where the object is.

117. Reflection Vocabulary Real Image – – Image is made from “real” light rays that converge at a real focal point so the image is REAL – Can be projected onto a screen because light actually passes through the point where the image appears – Always inverted

118. Reflection Vocabulary Virtual Image– – “Not Real” because it cannot be projected – Image only seems to be there!

119. Virtual Images in Plane Mirrors If light energy doesn't flow from the image, the image is "virtual". Rays seem to come from behind the mirror, but, of course, they don't. It is virtually as if the rays were coming from behind the mirror. "Virtually": the same as if As far as the eye-brain system is concerned, the effect is the same as would occur if the mirror were absent and the chess piece were actually located at the spot labeled "virtual image".

120. Hall Mirror Useful to think in terms of images “image” you “real” you mirror only needs to be half as high as you are tall. Your image will be twice as far from you as the mirror.

121. LEFT- RIGHT REVERSAL

122. Curved mirrors What if the mirror isn’t flat? – light still follows the same rules, with local surface normal Parabolic mirrors have exact focus – used in telescopes, backyard satellite dishes, etc. – also forms virtual image

123. Concave Mirrors Curves inward May be real or virtual image View kacleaveland's map Taken in a place with no name (See more photos or videos here)more photos or videos here "Have you ever approached a giant concave mirror? See your upside-down image suspended in mid-air. Walk through the image to see a new reflection, right-side-up and greatly magnified. In the background you see reflected a room full of visitors enjoying other

124. For a real object between f and the mirror, a virtual image is formed behind the mirror. The image is upright and larger than the object. For a real object between f and the mirror, a virtual image is formed behind the mirror. The position of the image is found by tracing the reflected rays back behind the mirror to where they meet. The image is upright and larger than the object.

125. For a real object between f and the mirror, a virtual image is formed behind the mirror. The position of the image is found by tracing the reflected rays back behind the mirror to where they meet. The image is upright and larger than the object. For a real object close to the mirror but outside of the center of curvature, the real image is formed between C and f. The image is inverted and smaller than the object. For a real object between C and f, a real image is formed outside of C. The image is inverted and larger than the object.

126. For a real object between f and the mirror, a virtual image is formed behind the mirror. The position of the image is found by tracing the reflected rays back behind the mirror to where they meet. The image is upright and larger than the object. For a real object close to the mirror but outside of the center of curvature, the real image is formed between C and f. The image is inverted and smaller than the object. For a real object between C and f, a real image is formed outside of C. The image is inverted and larger than the object. For a real object at C, the real image is formed at C. The image is inverted and the same size as the object. For a real object at C, the real image is formed at C. The image is inverted and the same size as the object.

127. For a real object between f and the mirror, a virtual image is formed behind the mirror. The position of the image is found by tracing the reflected rays back behind the mirror to where they meet. The image is upright and larger than the object. For a real object close to the mirror but outside of the center of curvature, the real image is formed between C and f. The image is inverted and smaller than the object. For a real object close to the mirror but outside of the center of curvature, the real image is formed between C and f. The image is inverted and smaller than the object.

128. For a real object at f, no image is formed. The reflected rays are parallel and never converge. For a real object at f, no image is formed. The reflected rays are parallel and never converge. What size image is formed if the real object is placed at the focal point f?

129. Date: 4/30Objective: I can investigate the images from curved mirrors Video

130. Date: 4/20Objective: I can investigate light and how shadows are created. Open TB to p. 530 Part A

131. Date: 4/21Objective: I can investigate light and how shadows are created. With your group complete TB to p. 530 Part A #1-9 5 min

132. Date: 4/21Objective: I can investigate light and how shadows are created. Independently read Text book p. 533-534 read and take cornell notes 10 min

133. Date: 4/21Objective: I can investigate light and how shadows are created. Independently read Text book p. 533 read and take cornell notes 10 min Light rays in holes – straight line –sun rays and laser Shadow- dark area where light is absent Size of the Shadow- distance between light, object and screen Sun Shadow –Angle Umbra-shadow of no light Penumbra- shadow edge that receives some light

134. Date: 4/21Objective: I can investigate light and how shadows are created. Independently read Text book p. 533 read and take cornell notes point vs extended light source

135. Date: 4/21Objective: I can investigate light and how shadows are created. Video

136. Date: 4/22Objective: I can investigate the reflection of light in a mirror Bell Ringer: Review questions 37-38

137. Date: 4/22Objective: I can investigate the reflection of light in a mirror Get a Textbook Independently answer Essential Questions p. 536 12 min

138. Date: 4/22Objective: I can investigate the reflection of light in a mirror Get a Textbook Independently answer Essential Questions p. 536 12 min HW: TB p. 537 #1-5

139. Date: 4/22Objective: I can investigate the reflection of light in a mirror As a class read TB p. 538

140. Date: 4/22Objective: I can investigate the reflection of light in a mirror With your group, complete TB p. 538 #1-13 Member #1 positions mirror and laser for #1,3,5,7,9,11,13 Member #2 reads directions for #1,3,5,7,9,11,13 Member #3 positions mirror and laser for #2,4,6,8,10,12 Member #4 reads directions for #2,4,6,8,10,12 All members write results Be careful with the lasers. DO NOT DIRECT the lasers near anyone’s eyes! Point lasers towards windows and door

141. Date: 4/23Objective: I can investigate the reflection of light in a mirror Bell Ringer: Review questions 38-39

142. Date: 4/23Objective: I can investigate the reflection of light in a mirror With your group, complete TB p. 538 #1-13

143. Date: 4/23Objective: I can investigate the reflection of light in a mirror With your group, complete TB p. 538 #1-13 Member #1 positions mirror and laser for #1,3,5,7,9,11,13 Member #2 reads directions for #1,3,5,7,9,11,13 Member #3 positions mirror and laser for #2,4,6,8,10,12 Member #4 reads directions for #2,4,6,8,10,12 All members write results Be careful with the lasers. DO NOT DIRECT the lasers near anyone’s eyes! Point lasers towards windows and door

144. Date: 4/24Objective: I can understand characteristics of reflection Bell Ringer : question #40

145. Date: 4/24Objective: I can understand characteristics of reflection With your group, complete TB p. 538

146. Date: 4/24Objective: I can understand characteristics of reflection With your group, complete TB p. 538 #1-13 Member #1 positions mirror and laser for #1,3,5,7,9,11,13 Member #2 reads directions for #1,3,5,7,9,11,13 Member #3 positions mirror and laser for #2,4,6,8,10,12 Member #4 reads directions for #2,4,6,8,10,12 All members write results Be careful with the lasers. DO NOT DIRECT the lasers near anyone’s eyes! Point lasers towards windows and door

147. Date: 4/24Objective: I can understand characteristics of reflection TB page 541

148. Date: 4/24Objective: I can understand characteristics of reflection Independently read TB page 541-543 and take cornell notes 10 min

149. Date: 4/24Objective: I can understand characteristics of reflection Independently read TB page 541-543 and take cornell notes 10 min HW: TB p. 537 #1-5

150. Date: 4/24Objective: I can understand characteristics of reflection Independently read TB page 541-543 10 min Mirror – larger image? Angle? Angle of incidence? Incident ray Angle of reflection-reflected ray

151. Law of reflection Mirror Incident Ray Norm al θiθi Rays reflect off a surface at the same angle they struck it with. This reflected angle is the angle of reflection. Reflected Ray Angle of incidenc e θrθr Angle of reflection

152. Date: 4/24Objective: I can understand characteristics of reflection Independently read TB page 541-543 10 min Law of reflection

153. Date: 4/24Objective: I can understand characteristics of reflection Independently read TB page 541-543 10 min Light waves – transverse waves No medium for light waves – vacuum Light carries energy