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  3. 1 the image of a film is to be cast on a screen wi

1 The image of a film is to be cast on a screen with a...

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Physics

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1 The image of a film is to be cast on a screen with a magni fication 50 times its height If focal length of the lens is 7 5 cm how far is the screen to be placed from the lens Under this condition what is the distance of the film from the lens 382 5 cm 7 65 cm

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