1. Explain the difference between real and virtual images.
2. Explain the difference between a concave and a convex mirror.
3. Explain the effect of spherical aberration.
4. For a mirror of given focal length, how does the image distance change if the object distance is decreased?
5. For a given object distance from a mirror, how does the image distance change if the focal length is increased?
6. The index of refraction depends on
(a) The focal length.
(b) The speed of light.
(c) The image distance.
(d) None of the above.
7. Snell’s law involves
(a) The lens equation.
(b) The index of refraction.
(c) The focal length.
(d) None of the above.