Q32 of 284 Page 262

A converging lens has a focal length of 50 cm. The power of this lens is:

P = 1/f (m)

More from this chapter

All 284 →
30

An object is placed at a distance of 100 cm ,from each of the above lenses A and B. Calculate (i) image distance, and (ii) magnification, in each of the two cases.

 31

The focal lengths of four convex lenses P, Q, R and S are 20 cm, 15 cm, 5 cm and 10 cm, respectively. lens having greatest power is:

 33

A diverging lens has a focal length of 0.10 m. The power of this lens will be:

 34

The power of a lens is + 2.0 D. Its focal length should be :