Question

The lens A produces a magnification of, −0.6 whereas lens B produces a magnification of + 0.6.

1. What is the nature of lens A?
2. What is the nature of lens B?

Answer 1

1. Negative magnification shows that the image is real and inverted. Therefore, it’s a convex lens.
2. Positive magnification shows that the image is virtual and erect. The lens can be concave or convex in nature. However, a convex lens always forms a magnified virtual image. According to the given magnification, the size of the image is smaller than the size of the object. Therefore, the lens must be concave in nature.