Let the refractive index of a denser medium with respect to a rarer medium be `n_(12)` and its critical angle be `theta_(c)`. At an angle of incidence A when light is travelling from denser medium to rarer medium, a part of the light is reflected and the rest is refracted and the angle between reflected and refracted rays is `90^(@)`, Angle A given by -A. `"tan"^(-1)("sin" theta_(c))`B. `(1)/("tan"^(-1) ("sin"theta_(c)))`C. `"cos"^(-1) ("sin"theta_(c))`D. `(1)/("cos"^(-1)("sin"theta_(c)))`

Let the refractive index of a denser medium with respect to a rarer me

1.	Let the refractive index of a denser medium with respect to a rarer medium be `n_(12)` and its critical angle be `theta_(c)`. At an angle of incidence A when light is travelling from denser medium to rarer medium, a part of the light is reflected and the rest is refracted and the angle between reflected and refracted rays is `90^(@)`, Angle A given by -A. `"tan"^(-1)("sin" theta_(c))`B. `(1)/("tan"^(-1) ("sin"theta_(c)))`C. `"cos"^(-1) ("sin"theta_(c))`D. `(1)/("cos"^(-1)("sin"theta_(c)))`
Answer» Correct Answer - A

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