Q .     A converging lens is used to form an image on a screen. When the upper half of the lens is covered by an opaque screen

JEE 1986

(This question may have multiple correct answers)

A half of the image will disappear
B complete image will be formed
C intensity of the image will increase
D intensity of the image will decrease

HINT

When upper half of the lens is covered, image is formed by the rays coming from lower half of the lens.
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