One Line Answer
The critical angle for glass-air is 450 for the light of yellow colour. State whether it will be less than, equal to, or more than 450 for (i) red light, (ii) blue light?
The critical angle for a pair of media is:
(i) more than 45o for red light.
(ii) less than 45o for blue light.
Concept: Total Internal Reflection
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