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what do we mean by aperture .define with diagram 

Asked by Sanchit Sharma 2nd March 2015, 6:49 PM
Answered by Expert
Answer:
Aperture of a lens is the effective diameter of its light transmitting area. Therefore, the brightness i.e. the intensity of the image formed by a lens which depends on the amount of light passing through the lens will vary as the square of the aperture of the lens.

Answered by Expert 2nd March 2015, 7:31 PM
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