Concave Lens

Q. Name the lens which is thinner at the center and thicker at the edges.

1. Prism
2. Concave
3. Convex
4. Plano convex

Q.

Can a convex lens give diverging rays?

Q.

In the above figure, the parallel rays meet/appear to meet ___.

1. at $F_2$

2. at $F_1$

3. at $2F_2$

4. at infinity

Q. State two differences between a convex and a concave lens.

Q.

Choose the correct ray diagram?

1. 

2. 

3. 

4. 

Q.

A lens which has two spherical surfaces both bulging inside is called ___.

1. concave lens

2. convex lens

3. plano-convex lens

4. plano-concave lens

Q. Primary focus of the concave lens lies on the left side of the optical centre of the lens.

1. False
2. True

Q.

Image formed by concave lens is mostly______ as compared to that of the object.

1. larger

2. smaller

3. point sized

4. infinitely larger

Q.

Which of the following relations is true for focal length (f) and the radius of curvature (r)?

1. f = 2r

2. f = r/2

3. f = r/2 + 1

4. f = r + 2