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in Physics by (25.3k points)
यदि विरल तथा सघन माध्यम में प्रकाश की चलें 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)cos c`
C. `v_(1)=v_(2) tan c`
D. `v_(1)=v_(2) " cosec "c`

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