Question

find the power of a convex lens of focal length 2.5 cm​

Answer 1

Answer:

power=1/focal length so here it is 1/2.5 so answer is=0.4Dioptre

Answer 2

Answer:

0.4 D

Explanation:

FORMULA OF POWER OF FOCAL LENGTH

P = 1/f

= 1/2.5 focal length given 2.5 cm

= 0.4 D unit of power of focal length