A person of height 1.8 m standing at the centre of a room having equal dimensions of 10 m wishes to see the full image of the back wall in the mirror fixed on the front wall. The minimum height of the plane mirror needed for this purpose is
(A) 0.9 m (B) 1.8 m (C)
10 3 m (D) 10 m
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to find the height of mirror we have directed the incident rays towards the eye of the observer rest u can see in picture
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Answer:
the mirror required half of the image hence , 1.8m
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