Questions
If two lenses of +5 dioptres are mounted at some distance apart, the equivalent power will always be negative if the distance is
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Correct option is A
Using P=P1+P2−d×P1P2for equivalent power to be negatived×P1P2>P1+P2⇒d×25>10⇒d>1025m⇒d>10×10025⇒d>40cmSimilar Questions
Image of the sun is formed by a binconvex lens of focal length f. The image is a circular patch of radius r and is formed on the focal plane of the lens. Choose the correct statement from the following
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