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+1 vote
23.7k views
in Physics by (45.7k points)

Rays from Sun converge at a point 15 cm in front of a concave mirror. Where should an object be placed so that size of its image is equal to the size of the object? 

(a) 15 cm in front of the mirror 

(b) 30 cm in front of the mirror 

(c) between 15 cm and 30 cm in front of the mirror 

(d) more than 30 cm in front of the mirror

1 Answer

+2 votes
by (46.2k points)
selected by
 
Best answer

The answer is (d) more than 30 cm in front of the mirror

Here f= 15, 

Radius of curvature is double the focal length hence

c = 30 

When object is placed on c, its image is of the same size, inverted and is formed on c

by (15 points)
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