Question

the convex lens is of focal length 25 cm. calculate the power of the lens ​

Answer 1

Explanation:

power = 1/0.25 = 0.4D...

Answer 2

Ello..✌✌

Given => Focal length ( f )= 25 cm = 0.25 m

To find => Power ( P ) = ?

Solution => We know that,

=> P = 1/f

=> P = 1/0.25

=> P = 4 D