Answer to Question #49688 in Optics for Shanu

Question #49688

A convex spherical refracting surface with radius R separates a medium having refractive index 5/2 from air.An object is moved towards the surface from far away from the surface along the central axis,its image-
a) changes from real to virtual when it is at a distance R from the surface.
b) changes from virtual to real when it is at a distance R from the surface.
c) changes from real to virtual when it is at a distance 2R/3 from the surface.
d) changes from virtual to real when it is at a distance 2R/3 from the surface.

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03.12.14, 17:10

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Shanu

03.12.14, 15:23

Thank you Sir.....

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