Question

A person is known to use lense power -7. 5 D his distinct vision. Calculate the focal length of the lense used for correcting his distinct vision

Answer 1

Answer:

The focal length if lens is 13.3cm.

Explanation:

Power is defined as the inverse of focal length of a lens.

$p = \frac{1}{f}$

$p = \frac{1}{7.5} = 13.3cm$