Question

6. A spherical mirror and thin spherical lens
have each of focal length of + 25 cm. The
mirror and the lens are likely to be
Both concave
(B) Both convex
(61 Mirror is concave and lens is convex
(D) Mirror is convex and lens is concave
​

Answer 1

Answer:

➧ Since, the focal length of the spherical mirror and the thin spherical lense is negative then it means a virtual image is formed on reflection. ➧ One characteristics of images formed on convex mirrors is that they are virtual. So, they are both convex.

Answer 2

Answer:

Both convex

Explanation:

According to Sign convention,

concave mirrors have negative focal length and convex mirrors have positive focal length.

AND,

concave lenses have negative focal length and convex lenses have positive focal length.