Which set of colours will come out in air for a situation shown in figure?

Which set of colours will come out in air for a situation shown in figure?

1. Orange, Red and Violet
2. Blue, Green and Yellow
3. Yellow, Orange and Red
4. All

Solution

We know, $\sin i_C=\frac{1}{\mu}$ Also $\mu \propto \frac{1}{\lambda}$ Thus $\sin i_c \propto \lambda$
Therefore, for higher value of $\lambda$ critical angle will be more Hence Yellow, Orange and Red will come out to air.

Asked in: NEET 2023 (Manipur)

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