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NEET2010PhysicsRay OpticsActual

The speed of light in media M ₁ and M ₂ is 1.5 10^8 ~m / s and 2.0 10^8 ~m / s respectively. A ray of light enters from medium M ₁ to M ₂ at an incidence angle i . If the ray suffers total internal reflection, the value of i is

Options

  1. Aequal to ⁻¹ ( 2 3 )
  2. Bequal to or less than ⁻¹ ( 3 5 )
  3. Cequal to or greater than ⁻¹ ( 3 4 )
  4. Dless than ⁻¹ ( 2 3 )

Correct answer

C. equal to or greater than ⁻¹ ( 3 4 )

Step-by-step solution

In total internal reflection, the angle of incidence (i) must be greater than critical angle C aligned 2 ₁ & =2 and ₂= 3 2 2 i & 3 2 90^ i & 3 4 i & ⁻¹ ( 3 4 ) aligned

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