A) 1.2
B) 1.4
C) 1.6
D) 1.9
Correct Answer: A
Solution :
Light ray is going from liquid (denser) to air (rarer) and angle of refraction is\[90{}^\circ \], so angle of incidence must be equal to critical angle from figure \[\sin \,C=\frac{4}{5}\] Also \[\mu \,\,=\,\,\frac{1}{\sin \,C}\,\,=\,\frac{5}{4}\,\,\,=\,\,1.2\]You need to login to perform this action.
You will be redirected in
3 sec