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two thin lenses of power +3.50D -2.50D are placed in contact. find the power and focal length of the lens combination

Posted by Jatin Lochav 5 years, 5 months ago

CBSE > Class 10 > Science

1 answers

Ishita Khadpe 5 years, 5 months ago

Total power = 3.5+(-2/5) = 1 D focal length = 1/total power = 1/1 = 1 m = 100 cm

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CBSE > Class 10 > Science