Question

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 effect would be to make the(a) image less bright.(b) lower half of the image disappear.(c) upper half of the image disappear.(d) image blurred.

why the image is blurred and less bright ? explain using ray diagram

Answer 1

Answer:

upper part of the image would disappear because the light rays which get reflected by the concave mirrorr are covergent rays  , and move in opposite directions .

The head of object will be the tail of image .

If lower half of the mirror is covered , the upper half of the imge would dissapear .

Since all the light rays dont get reflected , the image would seem less bright .

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