1. Optics

2. Learning Targets Sketch light rays based on the Law of Reflection. Identify the differences between images and objects. Explain the images in terms of direction (right-side- up or up-side-down) and size. Explain the types of images that can be viewed in plane, concave, and convex mirrors. Explain what refraction is and how it affects what we see in lenses. Explain the types of images that can be viewed in concave and convex lenses. Provide examples of applications of mirrors and lenses in the real world.

3. Happy Wednesday! Learning Target: Explain the Law of Reflection. Bell-Ringer: – Give one example when reflection is bad. – Give one example when reflection is good.

4. Happy Tuesday! LT: Explain what reflection is. Bell-Ringer: How many cats are there?

5. Agenda Notes Reflection Stations Lab Hand back tests

6. Law of Reflection If light is not absorbed, it bounces. This is called reflection. Billiards video Starting θ= Ending θ

7. Law of Reflection A different laser demo WALL

8. Law of Reflection In which direction will the laser beam go? WALL

9. Fiber Optics Draw what happens to a laser as it goes diagonally down the graduated cylinder.

10. Fiber Optics Fiber optics work because: – Light travels in a straight line. – Light reflects off of inner surfaces.

11. Optics Optics is the study of vision and how images are formed. We will study the following: – Mirrors PlaneConvexConcave – Lenses ConvexConcave

12. Objects and Images Objects are the real thing. Images are what we see. ImageObject

13. Plane Mirrors

15. Mirrors Plane Convex Concave

16. Mirrors The images produced by curved mirrors depends upon where the object is located. Object is farObject is near

17. Happy Wednesday! 2/22 Learning Target: Identify images and objects. Explain how light rays form images. Bell-Ringer: Why do you think this student wearing aluminum foil over his eyes? (Hint: They have pinholes in them!)

18. Happy Thursday! 2/23 Learning Target: Use the Law of Reflection. Bell-Ringer: Why does this woman look so crazy in the mirror? (What must be true about the mirror?)

19. Happy Thursday! LT: Explain how convex and concave mirrors change images. Bell-Ringer: Why does this woman look so crazy in the mirror? (What must be true about the mirror?)

21. Happy Friday! 2/24 Learning Target: Sketch light rays using the Law of Reflection. Bell-Ringer: – How do you think one-way mirrors work?

22. Happy Tuesday! 2/28 LT: Describe images in concave, convex, and plane mirrors. BR: Why is this building in front of a mirror?

24. What happens when light enters a different medium? When light is traveling through air and enters a different medium, three things can happen. 1.Light can be reflected (mirrors) 2.Light can be refracted (lenses) 3.Light can be reflected AND refracted! (total internal reflection)

25. 13-Aug-15Physics 1 (Garcia) SJSU Transparent, Reflecting Surfaces Water and glass are transparent but reflect some of the light striking their surface. Can see inside the cab through the right window. Strong reflection of the sun on the left window. Can see some of the riverbed through the water surface.

26. 13-Aug-15Physics 1 (Garcia) SJSU One Way Mirror One way mirror is just clear glass window. Bright Room Dark Room Discussion Room (Bright) Observation Room (Dark) GLASS Reflected light from bright room masks transmitted light from the darkened observation room

27. Law of Refraction When a beam of light passes into a new medium, it changes direction. This is called refraction. Just like with mirrors, lenses can distort an image so that the object looks different.

28. Refraction

29. Light refracts because it goes from one medium (air), which is thinner, to a different medium (water), which is thicker. Because light slows down in the water, it bends down. Laser Demo

30. Lenses Convex lenses are thicker in the middle than at the edges. Concave lenses are thinner in the middle that at the edges. What kind of lens is this?

31. Happy Monday! Learning Target: Use the law of reflection to make a laser hit a target. Bell-Ringer: The photographer is reflected in some- one’s eye. What kind of mirror is this? Explain how you know.

32. Happy Wednesday! Learning Target: Explain how lenses produce different images. Learning Target: Explain how lenses produce different images. Bell-Ringer: What are these raindrops doing the image of the leaf? Explain why you think it is doing this!

33. Agenda Finish Laser Challenge Refraction Stations Lab Finish Notes

34. Happy Thursday! Learning Target: Identify types of glasses and eye problems. Bell-Ringer: This student is looking through a concave lens and his image is smaller. What kind of mirror affects images this way?

35. Agenda Finish Notes Lenses Lab Optics Reading

36. Lenses How much a lens is curved affects how much it magnifies an image.

37. Lenses When light passes through a convex lens, light focuses to a point. This is called convergence. When light passes through a concave lens, light spreads out. This is called divergence.

38. Lenses Some people need lenses to correct their vision. People who are far-sighted can only see things clearly if they are far away. People who are near- sighted can only see things clearly if they are near.

39. Happy Thursday! Learning Target: Identify the types of lenses and their uses in cameras. Bell-Ringer: Besides cameras, glasses, and our eyes, list three other common places that we use lenses. Optics Test: Tuesday!

40. Agenda Camera Dissection Lab Finish Optics Practice Worksheet

41. Happy Friday! Learning Target: Review for test. Bell-Ringer: – Some people cook food using concave mirrors. Explain how this works.

42. Agenda Finish Optics Practice Worksheet Convex Lens – go outside to burn paper Video: How it’s Made – Contact Lenses Demo: Blind Spot Binder Organization Test Tuesday