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प्रश्न
What does Snell’s law become at the critical angle?
पर्याय
\[n_1\sin 90^\circ=n_2\sin 90^\circ\]
\[n_1\sin i_c=n_2\sin i_c\]
\[n_1\sin i_c=n_2\sin 90^\circ\]
\[n_1\sin 90^\circ=n_2\sin i_c\]
MCQ
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उत्तर
At the critical angle, substitute \[i=i_c\] and \[r=90^\circ\] into Snell’s law. This gives \[n_1\sin i_c=n_2\sin 90^\circ\].
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