Do Now: 5/13 A 3.5 cm object is 9 cm to the left of a concave mirror of 6 cm focal length. The image is located 18 cm from the mirror. Find the image height.

Do Now: Make a list of concepts you will need to know for your test

Review: Types of Images Image SizeEnlargedReduced Image Orientation Upright (Erect) Inverted Type of Image RealVirtual

Review: Images Produced dodo didi mimage d o >CC>d i >fReduced, inverted Real C>d o >fd i >CEnlarged, inverted Real f>d o (negative)Enlarged, erect Virtual

Do Now (5/24/12) Come in quietly, pass in your art piece and your Refraction Phet Lab, then wait for further instructions. *Reminder – Light Review Packet due tomorrow AND Light TEST tomorrow!

Ms. Timson’s Review to Conquer Physics

Rules of the Game There will be tribes, as divided by the teacher For each problem which appears on the slide, the tribe will be able to work together to vote on one answer given only the time which will be written on the slide. Tribes cast their answer using their voting cards only in the time allowed. Each team with a correct answer is allowed to cast one vote to remove another tribe from the island. The teacher will have each tribe cast their vote simultaneously by writing the color of the tribe they are voting for on their white board. The teacher will then remove tribes from the island. The teacher will track which tribes are in and which tribes are out of the game with signs on the board. If a tribe is voted out, they can reenter the game by answering the next question correctly to reenter. They will NOT receive a vote for that question but must wait until the next question. Winning tribes will be those still on the island at the end of the game. ***The teacher will be the final judge of any conflicts or confusions – and remember, be respectful and be honest!

1. Which has the larger critical angle in air? A)crown glass (n = 1.52) B) flint glass (n = 1.61) 55 seconds

2. The speed of light is greatest in ______. A)glass B) diamond C) water D) vacuum 10 seconds

3. Place in order from longest wavelength to shortest wavelength: 1 – visible light 2 – gamma rays 3 – microwaves 4 – radio waves 5 – ultraviolet A)5,2,1,3,4 B) 2,3,5,1,4 C) 4,3,1,5,2 D) 3,1,4,2,5 35 seconds

4. How long does it take light to travel from this text to your eyes? Assume a distance of 50.0 cm. The speed of light is 3 x 10 8 m/s. A.1.67 x s B x s C s D s 45 seconds

5. How far would light travel in 2.5 minutes? A.4.5 x m B. 7.5 x 10 8 m C. 2 x 10 6 m D. 1.2 x 10 8 m 40 seconds

6. Orange light has a wavelength of 6 x m. What is its frequency? A.5 x Hz B. 180 Hz C. 2 x Hz D. 2 x Hz

7. Light of which of the following colors has the shortest wavelength? A.red B. blue C. yellow D. green 15 seconds

8. Dispersion is the term used to describe _____. A.the splitting of white light into its component colors in refraction B.the propagation of light in straight lines C.the bending of beam of light when it goes from one medium to another D.the bending of a beam of light when it strikes a mirror 20 seconds

9. In a vacuum, the speed of light _________________. A.depends upon its frequency B.depends upon its wavelength C.depends upon the strength of its electric and magnetic fields D.is a universal constant15 seconds

10. After passing from one material into another, a light ray makes an angle of refraction of 39º. If it came from a medium with index of refraction 1.05 and passed into a medium with index of refraction of 1.13, what angle did the ray make when it was in the first medium? A.35.79º B º C º D º 65 seconds

11. What is the speed of light in ethanol? The index of refraction of ethanol is A.2.21 x 10 8 m/s B x 10 8 m/s C x 10 8 m/s D x 10 8 m/s 30 seconds

12. Which of the following statements is TRUE about the index of refraction of a material medium? A.It is a negative number. B.It is equal to 1. C.It is between 0 and 1. D.It is greater than seconds

13. When a beam of light enters one medium from another, which of the following quantities never changes? A.direction B. speed C. frequency D. wavelength 15 seconds

14. When you look at yourself in a plane mirror, what kind of image will you see? A.real image behind the mirror B.virtual image behind the mirror C.real image in front of the mirror D.virtual image in front of the mirror 20 seconds

15. How does the angle of incidence compare to the angle of refraction? A.is smaller B. is the same C. is larger D. may be A, B or C 10 seconds

16. A 5.00-cm tall object placed 45.0 cm from a concave mirror having a focal length of 15.0 cm. What is the image distance? A cm B cm C cm D cm 55 seconds

17. A 5.00-cm tall object placed 45.0 cm from a concave mirror having a focal length of 15.0 cm. What is the height of the image in #16? A.-2.5 cm B. 2.5 cm C cm D cm 55 seconds

18. After passing from one material into another, a light ray makes an angle of refraction of 11.63º. If it came from a medium with index of refraction 1.74 and passed into a medium with index of refraction 1.35, what angle of incidence did the ray make when it was in the first medium? A.9.0º B º C º D º70 seconds

At the interface between two materials, a light ray is at an angle of incidence of 45º on a side with an index of refraction of If the light is at an angle of º on the other side of the interface, what is the index of refraction on this side? A. 0.89B. 1.12C. 1.25D seconds 55 seconds

Where should an object be placed in front of a concave mirror to produce an erect image? A.less than fB. equal to f C. between f and 2fD. greater than 2f 55 seconds

The image formed by a concave mirror is larger than the object at which object distance? A.Less than 2fB. more than 2f B.C. any valueD. none. It is not possible.

An object farther from a converging lens than its focal point always has an image that is _____. inverted B. virtualC. the same sizeD. smaller in size 55 seconds

Relative to its object, a real image formed by a lens is always _____. erectB. invertedC. smallerD. larger 55 seconds

The image of an object 10 cm from a lens is located 10 cm behind the object. What is the focal length of the lens? +6.7 cmB cmC. +60 cmD. -20 cm 55 seconds

An object is located 10 cm from a converging lens of focal length 12 cm. What is the image distance? +5.5 cmB cmC. +60 cmD. -60 cm 55 seconds

Congratulations! Good luck tomorrow! I know you can conquer your test