A) \[120{}^\circ \]
B) \[30{}^\circ \]
C) \[60{}^\circ \]
D) \[90{}^\circ \]
Correct Answer: C
Solution :
Here, angle of incidence,\[i={{60}^{o}}\] \[\therefore \]Angle of deviation \[\delta ={{180}^{o}}-(i+r)\] \[={{180}^{o}}-2i\] \[(\text{As}\,\,i=r)\] \[={{180}^{o}}-2\times {{60}^{o}}={{60}^{o}}\]You need to login to perform this action.
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