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A concave spherical surface of radius of...

A concave spherical surface of radius of curvature `10 cm` separates two mediums `X` and `Y` of refractive indices `4//3` and `3//2` respectively. Centre of curvature of the surfaces lies in the medium `X`. An object is placed in medium `X`.

A

Image is always real

B

Image is real if the object distance is greater than `90`cm

C

Image is always virtual

D

Image is virtual only if the object distance is less then `90` cm

Text Solution

Verified by Experts

The correct Answer is:
C
(Moderate) Let there be two point objects `O_(1)` and `O_(2)`. Incident rays from `O_(1)` and `O_(2)` at point `P` shall both bend towards normal and hence the corresponding refracted rays shall intersect the principal axis in the left medium. Therefore image formed under given condition shall always be virtual.
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