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Question

A spherical surface of radius of curvature R separates air (refractive index 1.0) from glass (refractive index 1.5).The centre of curvature is in the glass. A point object P placed in air is found to have a real image Q in the glass. The line PQ cuts the surface at a point O and PO=OQ.Find the distance of object from the spherical surface.

A
3R
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B
5R
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C
R
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D
2R
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