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MHT CET202620 April 2026Morning ShiftPhysicsWave OpticsActual

In a biprism experiment, the distance between 4^ th and 13^ th bright band on the same side is ' y ' when light of wavelength 6000 Å is used. For a light of wavelength ' ' the distance between 6^ th and 16^ th bright band on the same side is again ' y '. The value of ' ' in Å units is

Options

  1. A6500
  2. B6300
  3. C5400
  4. D4800

Correct answer

C. 5400

Step-by-step solution

The distance of the n^ th bright band from the central maximum is given by x_n = n D d The distance between the 4^ th and 13^ th bright band is y = (13 - 4) ₁ D d = 9 ₁ D d The distance between the 6^ th and 16^ th bright band is y = (16 - 6) D d = 10 D d Equating the two expressions for y : 9 ₁ D d = 10 D d 9 ₁ = 10 Substituting ₁ = 6000 : 9 6000 = 10 = 54000 10 = 5400 Answer: 5400

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