Question

Thin lens approximation for a lens is ______.

विकल्प

• `1/v + 1/u = 1/f`

• `1/v - 1/u = - 1/f`

• `1/v + 1/u = - 1/f`

• `1/v - 1/u = 1/f`

Answer 1

Thin lens approximation for a lens is `underline(1/v - 1/u = 1/f)`.