A)
How fast is the light travelling in the liquid? \[1.8\times {{10}^{8}}\,m/s\]
B) \[2.4\times {{10}^{8}}\]
C) \[3.0\times {{10}^{8}}\,m/s\]
D) \[1.2\times {{10}^{8}}\,m/s\]
Correct Answer: A
Solution :
Key Idea: Critical angle is the angle of incidence in denser medium for which the angle of refraction in rarer medium is \[{{90}^{\text{o}}}\]. As shown in figure, a light ray from the coin will not emerge out of liquid, if \[i>C\].You need to login to perform this action.
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