Question

A concave lens is of focal length of 150 cm. What is the power of lens

Answer 1

GIVEN:

focal length =150 cm=1.5 m

SOLUTION:

$power = \frac{1}{f} \\ power = \frac{1}{1.5} \\ power =0.1 \: diaoptre$

I hope this helps ( ╹▽╹ )