Power of a lens is 0.4 D. what is its focal length?
Asked by jatin452002 | 8th Jun, 2017, 06:40: PM
If the Power (P) of a lens is 0.4 D,
The focal length (f) of the lense is given by the following relation:
Therefore the focal length of the given lense is 250 cm.
Answered by Abhijeet Mishra | 9th Jun, 2017, 09:59: AM
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