Question

How does the thickness of a lens affect it's focal length for class 10​

Answer 1

Answer:

The lens having more thickness alters the path of light more effectively and due to bending of light, the focal length decreases.

So, the more thicker is the lens, the more light will bend and will thus decrease the focal length.

You can simply write: The more thick is the lens, the less focal length, it will have.