Diverging light rays from a nearby object (a few focal lengths away from the mirror) strike the surface of a concave mirror. After reflecting from the mirror’s surface, the rays will converge at   a. the mirror’s focal point.   b. a point beyond the mirror’s focal point.   c. a point nearer than the mirror’s focal point.   d. none of the above.

If the eyepiece of a telescope is replaced with an eyepiece with a focal length twice as long, the magnifying power is   a. four times greater.   b. two times greater.   c. four times less.   d. two times less.

w9-19 physics An object is placed 20.0 cm from a converging lens with focal length 15.0 cm (see the figure, not drawn to scale). A concave mirror with focal length 10.0 cm is located 76.0 cm to the right of the lens. Light goes through the lens, reflects from the mirror, and passes through the lens again, forming a final image. d=76.0 What is the location of the final image?  ______cm to the left of the lens

When a light ray moves from air into glass, which has a higher index of refraction, its path is a) not bent. b) bent toward the normal. C) parallel to the normal. d) parallel to the surface of the glass. e) bent away from the normal.