Q13 of 284 Page 261

A diverging lens has a focal length of 3 cm. Calculate the power.

Here, f = -3 cm = -0.03 m (Diverging lens)

P = 1/f


= 1/(-0.03)


= -33.33 D


Power of the diverging lens is -33.33 Dioptre.


More from this chapter

All 284 →
11

A converging lens has a focal length of 50 mm. What is the power of the lens ?

 12

What is the power of a convex lens whole focal length is 80 cm ?

 14

The power of a lens is + 0.2 D. Calculate its focal length.

 15

The power of a lens is, - 2 D. What is its focal length ?