Question

Prachi determined the focal length of a device X by focusing a distant object on the screen as shown in the follwing diagram.
Select the correct statement from the following.
Device X is a concave mirror and d is its focal length
Device X is a convex mirror and d is its radius of curvature
Device X is a concave lens and d is its radius of curvature
Device X is a convex lens and d is its focal length

Answer 1

Explanation:

Prachi determined the focal length of a device X by focusing a distant object on the screen as shown in the follwing diagram.

Select the correct statement from the following.

Device X is a concave mirror and d is its focal length

Device X is a convex mirror and d is its radius of curvature

Device X is a concave lens and d is its radius of curvature

Device X is a convex lens and d is its focal length