A) \[60{}^\circ \]
B) \[30{}^\circ \]
C) \[45{}^\circ \]
D) \[90{}^\circ \]
Correct Answer: B
Solution :
Glancing angle \[=90{}^\circ -\angle r\] \[=90{}^\circ -60{}^\circ =30{}^\circ \]You need to login to perform this action.
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