Question

The focal length of a diverging lens is 50 cm. The power of the lens is?

• A. -5 D
• B. -2 D
• C. 5D
• D. 2 D

Answer 1

Answer:

B. -2 D

• Power (P) = 1/f (in meters).

• Here, f = -0.5 m, so P = -5 D.