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
- A⁻¹ ( 2 3 )
- B45^
- C60^
- 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^ .