Copy of 4.3 Optics Files Assessment(7th period)

First and last name:

1. What kind of lens or mirror is this?

• concave
• convex
• plane

2. What kind of lens or mirror is this?

• concave
• convex
• plane

4. When light rays pass through a transparent medium it changes speed, causing them to bend. This is called:

• reflection
• convergent
• refraction
• read image

5. When light rays pass through a concave lens, the light rays __________ (spread out).

• converge
• diverge
• reflect
• refract

6. When light rays pass through a convex lens, the light rays ___________ (focus/come together)

• converage
• diverge
• reflect
• refract

7. What kind of lens is the boy in the picture holding?

• concave lens
• convex lens

8. What kind of lens is the girl in the picture holding?

• concave lens
• convex lens

9.What kind of mirrors and lens would you use to create a security system for your home? Explain why and give at least 2 examples.