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38 An image of the sun is formed by a lens of focal length 30...

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38 An image of the sun is formed by a lens of focal length 30 cm on the metal surface of a photo electric cell and it produces a current I The lens forming the image is then replaced by another lens of the same diameter but of focal length 15 cm The photoelectric current this case will be In both cases the plate is kept at focal plane and normal to the axis lens 2 21 1 1 2 3 I 4 41

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