A) \[0{}^\circ \]
B) \[80{}^\circ \]
C) \[{{50}^{0}}-{{\sin }^{-1}}\left[ \frac{\sin \,{{50}^{0}}}{1.5} \right]\]
D) \[{{50}^{0}}-{{\sin }^{-1}}\left[ \frac{\sin \,{{50}^{0}}}{1.5} \right]-{{50}^{0}}\]
Correct Answer: B
Solution :
Refractive index, \[^{a}{{\mu }_{g}}=1.5\] \[\frac{1}{\sin C}=1.5\] \[\Rightarrow \] \[C={{42}^{o}}\] Critical angle for glass \[=42{}^\circ \] When the angle of incidence in the denser medium is greater than the critical angle, reflection takes place inside the denser medium. Hence, a ray of light incident at \[50{}^\circ \] in glass medium undergoes total internal reflection. Deviation\[(\delta )=180{}^\circ -(50{}^\circ +50{}^\circ )\](from the figure) or \[\delta =80{}^\circ \]You need to login to perform this action.
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