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Refracting telescopes, if uncorrected, suffer from chromatic aberration.
Chromatic aberration occurs because:
a) red light is focused more strongly than blue light
b) blue light is focused more strongly than red light
c) the outer light rays are focused more strongly than the central rays,
d) the central light rays are focused more strongly than the outer rays.
Ans- Blue light is focused more strongly than red light
Defect of short sightedness In this defect the image of the object is formed in front of retina or the lens become so converging.
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whta is three application of electrostyatics
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