A) violet
B) blue
C) green
D) red
Correct Answer: D
Solution :
Rise = Real depth-apparent depth \[=R\,\,.\,\,D-\frac{R\,.\,\,D}{\mu }=R\,.\,D\left( 1-\frac{1}{\mu } \right)\] Thus, for least rise \[\mu \] should be least. Refractive index is least for red colour.
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