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WBJEEA point source S is placed at the bottom of a transparent block...
A point source S is placed at the bottom of a transparent block of height 10 mm and refractive index 2.72. It is immersed in a lower refractive index liquid as shown in the figure. It is found that the light emerging from the block to the liquid forms a circular bright spot of diameter 11.54 mm on the top of the block. The refractive index of the liquid is
Solution:
tanθC=rh=5.7710≈√3
⇒θC=30o
⇒sinθC=μlμb
⇒μl=2.72×12=1.36
⇒θC=30o
⇒sinθC=μlμb
⇒μl=2.72×12=1.36
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