Glass has refractive index \( \mu \) with respect to air and the critical angle for a ray of lig...
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Glass has refractive index \( \mu \) with respect to air and the critical angle for a ray of light going from glass to air is \( \theta \).
(A) \( \sin ^{-1}\left(\frac{1}{\sqrt{\mu}}\right) \)
(B) \( \sin ^{-1}\left(\frac{1}{\mu^{2}}\right) \)
(C) \( 90^{\circ} \)
(D) \( \sin ^{-1}\left(\frac{1}{\mu}\right) \)
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