Question

The lens A produces a magnification of, − 0.6 whereas lens B produces a magnification of + 0.6.
(a) What is the nature of lens A?
(b) What is the nature of lens B?

Answer 1

Answer:

a) convex lens

b) concave lens

Answer 2

Explanation:

• (a) Lens A have a negative magnification of -6. Only a lens which produces a real and inverted images can posses a negative magnification.
• And the lens which produces real and inverted images is a convex lens after convergence of the rays of light.
• (b) Lens B have a negative magnification of -6. Only a lens which produces a virtual and erect image can posses a negative magnification.
• And the lens which produces virtual and erect images is a concave lens after divergence of the rays of light.