Question

If a convex lens is dipped in a liquid when refractive index is equal to the refractive index of the lens, then lens acts like a?

Answer 1

Answer:it will behave like plane sheet having focal length infinite

Explanation:

As lens makers formula

1/f = (n2/n1 -1)[1/R1 - 1/R2]

As n2= n1

Thus 1/f = (1-1)[1/R1 -1/R2]

So. 1/ f = 0