Question

Both a spherical mirror and a thin spherical lens have a focal length of (-) 15cm.what type o mirror and lens are these? ​

Answer 1

Answer:

By convention, the focal length of a concave mirror and a concave lens are taken as negative. Hence, both the spherical mirror and the thin spherical lens are concave in nature.

Answer 2

Answer:

A spherical mirror and a thin spherical lens have each a focal length of -15 cm. The mirror and the lens are likely to be Concept: Representation of Images Formed by Spherical Mirrors Using Ray Diagrams - Concave Mirror.