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in Physics by (82.5k points)
किसी सघन माघ्यम में क्रांतिक कोण को निउम्लिखित से व्यक्त किया जाता है-
`θc=tan^(-1)((3)/(4))`
सघन माध्यम का अपवर्तनांक विरल माघ्यम के सापेक्ष है-
A. `5//4`
B. `5//3`
C. `7//5`
D. `4//3`

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