1.

a person is not able to read from a book until he keeps it at 50cm. determine the power of corrective lens

Answer»

The POWER of the corrective lens should be  2 Dioptre.
P = \frac{1}{f}
                                               50 CM\frac{50}{100} meters
P = \frac{1}{ \frac{50}{100} }
P = +2D



Discussion

No Comment Found

Related InterviewSolutions