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in Physics by (82.5k points)
यदि विरल तथा सघन माघ्यम में प्रकाश की चाल क्रमश: `v_(1)` तथा `v_(2)` हो तथा सघन माध्यम में क्रांतिक कोण C हो तब-
A. `v_(1)=v_(2)sinC`
B. `v_(1)=v_(2)cosC`
C. `v_(1)=v_(2)tanC`
D. `v_(1)=v_(2)=co s e c C`

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