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MHT CET202410 May 2024Evening ShiftPhysicsWave OpticsActual

Two light rays having the same wavelength ' ' in vacuum are in phase initially. Then, the first ray travels a path ' L ₁ ' through a medium of refractive index ' ₁ ' while the second ray travels a path of length ' L ₂ ' through a medium of refractive index ' ₂ '. The two waves are then combined to observe interference. The phase difference between the two waves is

Options

  1. A2 ( ₁ L₁- ₂ L₂ )
  2. B2 (L₂-L₁ )
  3. C2 ( ~L ₁ ₁ - L ₂ ₂ )
  4. D2 ( ₂ L₁- ₁ L₂ )

Correct answer

A. 2 ( ₁ L₁- ₂ L₂ )

Step-by-step solution

Optical path difference = ₁ L₁- ₂ L₂ Phase difference = 2 Path difference Phase difference = 2 [ ₁ L₁- ₂ L₂ ]

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