Questions
A point source of light S is placed on the axis of a lens of focal length 20 cm as shown. A screen is placed normal to the axis of lens at a distance x from it. Then INCORRECT statement.
detailed solution
Correct option is A
1v−1u=1f⇒1v⇒1v−1(−25)=1201v=120−125=1100⇒V=100 cmFrom O to I intensity increases and then decreases at x = 90 cm and 110 cm intensity is same (d) Radius at x = 20 cm is equal to radius of lens.Talk to our academic expert!
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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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