1.

two lenses of focal length +10cm and+25 cm are kept in contact . Find the power of the.combination

Answer»

First convert f in metres so lens 1 has f=0.1m and lens2 has f=0.25m.

Power of lens1 = 1/0.1 = 10D

Power of lens2 = 1/0.25 = 4D

Effective power = P1+P2 = 10D + 4D = 14D.



Discussion

No Comment Found

Related InterviewSolutions