1.

The power of a concave lens of focal length 1 mm is(a) 0.01 D(b) 100 D(c) 0.001 D(d) 1000 D

Answer»

Given f = 1 mm

f = 1 x 10-3m

Power of concave lens P = 1/f

P = \(\frac1{1\times10^{-3}}\)

P = 1000 D



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