1. Is the velocity of the wave shown above

2. For reflection of light, we have the situation shown in Figure 1. The two plane mirrors in Figure 2 are at 90 o to each other, and the incident light beam is in the plane of the screen By making a careful sketch of the reflection beam in Figure 2, decide which best describes its final outgoing path. Figure 1Figure 2

3. The index of refraction of glass decreases with increasing wavelength in the optical region Red light has a longer wave length then violet light Which of the following best represents the refraction of white light (contains all colors red to violet)

4. Snell’s law for refraction of light is where: If the velocity of light is greater in medium 2 than medium 1, is

5. Total internal reflection occurs when

6. For the refraction of light from the fish on the right, which is correct? Use a sketch of the path of 2 light rays from the same spot on the fish to decide if a person in the air sees the fish at depth d where

7. From a sketch roughly to scale, use principal rays to determine weather the position of the image is approximately at (a) A(b) B(c) C(d) D 1. Is the image (a) virtual(b) real 2. Is the image (a) upright(b) inverted 3. Is the magnification of the image (a) >1(b) 1(c) <1 4. Is the image distance (a) negative(b) positive

8. From a sketch roughly to scale, use principal rays to determine whether the position of the image is approximately at (a) A(b) B(c) C(d) D(e) E 1. Is the image (a) virtual(b) real 2. Is the image (a) upright(b) inverted 3. Is the magnification of the image (a) >1(b) 1(c) <1 4. Is the image distance (a) negative(b) positive

9. 1. For the thin lenses above, roughly where is the final image from the two lenses? (a) A(b) B(c) C(d) D (e) E 2. The image distance for lens #2 is (a) positive(b) negative F 1 shows the focal points of lens #1, and F 2 for lens #2.

10. Lensmaker’s equation R is positive if C is in back of the surface. 1. What is the focal length of the lens above? (a) 0.025 cm(b) 40 cm (c) -40 cm (d) 0.075 cm (e) 13.3 cm

11. Lensmaker’s equation R is positive if C is in back of the surface. 1. What is the focal length of the lens above? (a) 0.050 cm(b) 20 cm (c) -20 cm (dc) -0.05 cm (e) not enough info to tell

12. Lens 1Lens 2 Is Lens 1 (a) Converging(b) Diverging (c) Neither ? Is Lens 2 (a) Converging (b) Diverging (c) Neither ?

13. Lens 1Lens 2 Is Lens 1 (a) Converging(b) Diverging (c) Neither ? Is Lens 2 (a) Converging (b) Diverging (c) Neither ?

14. Where is the image? (a) A(b) B Water Glass rod

15. 1. Is R (a) positive(b) negative 4. With a careful drawing and Snell’s law can you tell whether the image is in front of or behind the surface, without using Equation 1? (Answer (a) for yes and (b) for no) 3. What is the magnification? (a) 1 2. Where is the image formed from the glass surface (a) to right of surface(b) to left of surface