A man holds a rectangular card in front of and parallel to a plane mirror. In order for him to see the entire image of the card, what is the least mirror area needed ? Explain properly.
Answers
Answered by
44
we know, In order to see full-length image, a person requires a plane mirror which is half of his own height.
Let length of rectangular card is l
then, length of plane mirror should be l/2
and if breadth of rectangular card is b
then, breadth of plane mirror should be b/2
so, area of plane mirror = lb/4 while area of rectangular card = lb.
hence, one - fourth area of plane mirror is needed to see the entire image of the card .
Let length of rectangular card is l
then, length of plane mirror should be l/2
and if breadth of rectangular card is b
then, breadth of plane mirror should be b/2
so, area of plane mirror = lb/4 while area of rectangular card = lb.
hence, one - fourth area of plane mirror is needed to see the entire image of the card .
Answered by
3
Depend upon far away distance from the mirror, the eye is close and put mirror close by the card.
This should operate with assuming the farthest way and includes parallax approach.
This should be identified well and keep an eye on mirror only one degree.
The size could be arranged and includes both mirror and card reflection.
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