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JEE Main202125 Jul 2021Morning ShiftPhysicsRay OpticsActual

A ray of laser of a wavelength 630 nm is incident at an angle of 30 ° at the diamond-air interface. It is going from diamond to air. The refractive index of diamond is 2 . 42 and that of air is 1 . Choose the correct option.

Options

  1. AAngle of refraction is 24 . 41 ° .
  2. BAngle of refraction is 30 ° .
  3. CRefraction is not possible.
  4. DAngle of refraction is 53 . 4 ° .

Correct answer

C. Refraction is not possible.

Step-by-step solution

sinθ C = 1 μ = 1 2 μ 2 < sinθ C sinθ > sinθ C θ > θ C Total internal reflection will happen.

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