A) 1.732
B) 1.5
C) 1.4
D) 1.5
Correct Answer: A
Solution :
Angle of incidence \[i={{60}^{o}}\]is given As it is clear that the angle of reflection = angle of incidence Angle of reflection \[={{60}^{o}}\] As the reflected and refracted rays are mutually perpendicular. Hence, angle of refraction \[r=[{{180}^{o}}-({{90}^{o}}+{{60}^{o}})]={{30}^{o}}\] Now, the refractive index of plate is \[\mu =\frac{\sin i}{\sin r}=\frac{\sin {{60}^{o}}}{\sin {{30}^{o}}}\] \[=\frac{0.866}{0.6}\] \[=1.732\]You need to login to perform this action.
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