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A ray of light is incident at 60º on a prism of refracting angle 30º . The emergent ray is at an angle 30º with the incident ray. The value of refractive index of the prism is
  • a)
    √3/4
  • b)
    √3/2
  • c)
    √3
  • d)
    2/√3
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
A ray of light is incident at 60º on a prism of refracting angle ...
Angle of prism = 30º = A
Angle of incidence = i1 = 60º
Angle of emergence = i2 = ?
Angle of devation = D = 30º
∴ i2 = A + D - i2 = 30 + 30 - 60 = 0º
⇒ r2 = 0º
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A ray of light is incident at 60º on a prism of refracting angle 30º . The emergent ray is at an angle 30º with the incident ray. The value of refractive index of the prism isa)√3/4b)√3/2c)√3d)2/√3Correct answer is option 'C'. Can you explain this answer?
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