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How will the intensity of image formed by half - covered lens compare with non - covered lens?

Intensity of the half covered lens will be dim than the intensity of the full covered lens because less refracted rays will meet at the position of the wave in the case of half covered lens.

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in half covered lens intensity will be lower and forms a blurred image
in un-covered lens intensity will be more and it forms a clear image 
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intensity of image formed by half covered lens will be less as all the less light rays will be used to form the image..
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half - covered lens will produced image with less intensity( dim ) as compared to image formed by non - covered lens as in half covered lens , less reflected rays will meet than non covered lens thus producing dim image.
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