Question

In a compound microscope the lenses used are :

• A. both convex of same focal length
• B. both convex of different focal length
• C. both concave of same focal length
• D. one convex and one concave of different focal length

Answer 1

Answer: (B)

both convex of different focal length

A compound microscope uses multiple lenses to magnify an image for an observer. It is made of two convex lenses .The first, the ocular lens, is close to the eye and the other lens is objective lens. Both the lenses are of different focal length because uses of both are different. Hence correct option is B.