Question

What is the focal length of a lens when it bounded by two spherical surfaces curved inwards? ​

Answer 1

The focal length of concave lens is always

POSITIVE... xd

Hope it Helps..

Answer 2

The focal length of a lens which is found by two spherical surfaces in words is always positive.

Explanation:

• If the two surfaces of the the lens is towards the in what direction then it is a convex lens.

• A concave lens has this focal length as negative and a convex lens has a focal length which is always positive in nature. A convex lens is also known as converging lens because it is used to convert the release of alight from infinity at a given point.

To know more about convex lens,

a convex lens of focal length is 10 centimetre calculate its power ...

https://brainly.in/question/14838578