The light rays in the illustration below do not properly focus at the focal point. this problem occurs with? A. all spherical mirrors

B. all parabolic mirrors

C. only defective spherical mirrors

D. only defective parabolic mirrors

The problem occurs with all spherical mirrors.

Spherical mirrors are practical up to about inches in diameter.

Reflecting telescopes use spherical mirrors for apertures up to about 4 ".

Larger aperture telescopes use parabolic mirrors to obtain sharp focus.

at positions a, g kinetic energy is maximum.

at position d, potential energy is maximum.

a electromagnetic waves