Question

What is the power of a concave lens whose focal length is -75 cm?

Answer 1

HEYA GM ❤

★ POWER = 1/F (metres)

POWER = 1/F (metres) » POWER = 100 / -75 = -(4/3) = 1.33 DIOPTRES.

POWER = 1/F (metres) » POWER = 100 / -75 = -(4/3) = 1.33 DIOPTRES.TQ ❤ ❤

Answer 2

Answer:

-1.33D

Explanation:

hope you get it

the formula is 1/f