if refraction Index of a denser medium is root 2 what should be the value of critical angle in the medium?
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Refractive index is n = c/v where c is velocity of light in vacuum and v in the medium. Since n = √2, v=c/√2. Now critical angle is arcsin(v/c) which in this case is arcsin(1/√2). It is 45 degrees.
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