Question

2. How are these two types of
lenses used?​

Answer 1

Answer:

Lenses are commonly used in cameras, telescopes, microscopes and film projectors. There are also two lenses in our eyes through which we see around us. Lenses of many different types are used in optical devices such as cameras, eyeglasses, microscopes, telescopes, and projectors.

Answer 2

Answer:

concave and convex lenses