1) How does light interact with matter?

2) A is a curved piece of glass or other transparent material that refracts light.

3) Describe the shapes of a concave lens and a convex lens:

4) Explain how you can tell whether a convex lens will produce a real or virtual image.

5) Now I know that the type of image formed by a lens depends on:

The space between two 15-in.-long concentric cylinders is filled with glycerin (viscosity = 8.5 × 10-3 lb·s/ft2). the inner cylinder has a radius of 1 in. and the gap width between cylinders is 0.1 in. determine (a) the torque and (b) the power required to rotate the inner cylinder at 180 rev/min. the outer cylinder is fixed. assume the velocity distribution in the gap to be linear.