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Most Important Selected Qs for JEE AdvancedPhysicsWave Optics

A Young's double slit experiment is conducted in water ( ₁ ) as shown in the figure, and a glass plate of thickness t and refractive index ₂ is placed in the path of S ₂ . Then,

Options

  1. AOptical path difference at ' O ' is ( ₂ ₁ -1 ) t .
  2. BOptical path difference at ' O ' is ( ₂- ₁ ) t ..
  3. COptical path difference is independent of position of glass plate, provided light from S₂ passes through it.
  4. DNone of the above

Correct answer

C. Optical path difference is independent of position of glass plate, provided light from S₂ passes through it.

Step-by-step solution

aligned & Equivalent length of the glass plate in water = ₂ t ₁ & O.P.D. = ( ₂ ₁ -1 ) aligned

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