A concave mirror of radius R is kept on a horizontal table according the figure. Water (Refractive index = µ) is poured into it upto a hight h. Where should an object be placed so that its image is formed on it self.
A
R above the water surface
B
above the water surface
C
µR above the water surface
D
µ(R – h) above the water surface
Text Solution
Verified by ExpertsThe correct answer is:
B
Let x is height of an object which is placed at O position.
When, after refraction image forms at C of curvature. LM is perpendicular to concave mirror.
CA = 
OA ⇒ CA = 
x ......(1)
CA = (R – h)
Putting in Ist equation
(R – h) = µx
distance of object from surface of water
x = 
option B is correct
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