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What is the critical angle in a polystyrene
block whose index of refraction is 1.49 when
this block is immersed in carbon disulphide
whose index of refraction is 1.63?
37.80
B .42.20
8
A
66.00
There won't be total intemal
D
reflection inside the polystyrene
when it is in carbon disulphide.
00

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