Math, asked by rashid2120, 9 months ago

Power of the lens is -40, its focal length is

answer plzzz

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Answered by Anonymous

1

Answer:

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Answered by 1008679

1

Answer:

50 cm

Step-by-step explanation:

Power of a lens is -2D, negative sign indicates it is a Concave lens. Focal length (in meters)=1/power of the lens, thus focal length=1/2=0.5m=50cm

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