Question

C
EXAMPLE 64. In Fig. 9.87, a convex lens L is placed at a
distance of 36 cm from a screen. If a point-source P is placed
at 56 cm from the screen, then a circular spot of light of
diameter equal to the diameter of the lens is formed. Show the
image formation by a ray diagram. Calculate upto what
distance the source be displaced so that its clear image can be
formed on the screen.​

Answer 1

Answer:

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