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Q.

A concave mirror forms the image of an object on a screen. If the lower half of the mirror is covered with an opaque card, it is done in order:

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a

to make the image less bright

b

to make the lower half of the image

c

to make the upper half of the image disappear

d

to make the image blurred

answer is A.

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Detailed Solution

In a concave mirror forms the image of an object on a screen. If the lower half of the mirror is covered with an opaque card, the brightness of image will be reduced.
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