Review Conceptual Example 1 before attempting this problem. Aperson whose eyes a

Question

Review Conceptual Example 1 before attempting this problem. Aperson whose eyes are 1.70 m above thefloor stands in front of a plane mirror. The top of her head is0.14 m above her eyes. (a) What is the height of the shortest mirrorin which she can see her entire image?
1 m

(b) How far above the floor should the bottom edge of the mirror beplaced?
2 m
(a) What is the height of the shortest mirrorin which she can see her entire image?
1 m

(b) How far above the floor should the bottom edge of the mirror beplaced?
2 m

Explanation / Answer

(a) What is the height of the shortest mirrorin which she can see her entire image?
1 m
to see the full image the mirror should be half of the height
so minimum height of the mirror=1/2(1.70+0.14)=0.92m

(b) How far above the floor should the bottom edge of the mirror beplaced?
2 m
             1.70/2=0.85m

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