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Concepts Of Physics MCQ Edition [Volume 1]PhysicsGeometrical Optics

Determine the maximum angle of refraction when a light ray is refracted from glass ( = 1.50 ) into air.

Options

  1. A⁻¹ ( 2 3 )
  2. B45^
  3. C60^
  4. D90^

Correct answer

D. 90^

Step-by-step solution

According to Snell's law: ₁ i = ₂ r For light traveling from glass ( ₁ = 1.50 ) to air ( ₂ = 1 ), we have: 1.50 i = 1 r The maximum possible value for r during refraction is 1 , which occurs when the incident angle is equal to the critical angle. When r = 1 , the angle of refraction is r = 90^ . Therefore, the maximum angle of refraction is 90^ .

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