Geometrical OpticsEasy
Question
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
Options
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
Solution
When upper half of the lensis covered, image is formed bu the rays coming from lower half of the lens. Or image will be formed by the less number of rays. Therefore, intensity of image will decrease. But complete image will be formmed.
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