Question

Lenses are mainly of two types. If we touch first kind of lens we may feel them to be thicker in the middle than at the edges and these lenses are called----------- while lenses of other kind are thinner in the middle than at the edges. These are known as ___ respectively *



a. Convex lens, concave lens

b. concave lens, convex lens

c. convex lens, convex lens

d. concave lens, concave lens

​

Answer 1

Answer:

a. convex lens, concave lens is your answer

Answer 2

1. correct option is options a and c