Q)
(chatquestion)...214 Ray Optics and Optical Instruments
12. A black spot on the surface of a glass sphere of
3
is viewed from diametrical
2
refractive index u =
opposite position. It appears to be at a distance
of 10 cm from spot. Diameter of sphere is
(1) 5 cm
(2) 10 cm
(3) 15 cm
(4) 20 cm
1 Answer
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