Question

When using the thin lens equation, what explains why the value for the focal length of a given lens doesn't change?

The object and image distance change inversely, but in the same ratio.

The specific material and shape of each lens determines how it refracts light rays.

The object and image distance always change in direct proportion.

The focal length is a universal constant.

Answer 1

D) The specific material and shape of each lens determines how it refracts light rays.

Step-by-step explanation:

The specific material and shape of each lens determines how it refracts light rays. Since the index of refraction for the material and its specific shape determine how it bends light, the focal length for a given lens doesn't change. If you change the position of the object, the distance of the image will change inversely, but not in given ratio.

hope it helps:)

Answer 2

The specific material and shape of each lens determines how it refracts light rays.