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KCET2013PhysicsWave Optics

₁ and ₂ are used to illuminate the slits. ₁ and ₂ are the corresponding fringe widths. The wavelength ₁ can produce photoelectric effect when incident on a metal. But the wavelength ₂ cannot produce photoelectric effect. The correct relation between ₁ and ₂ is

Options

  1. A₁ < ₂
  2. B₁= ₂
  3. C₁> ₂
  4. D₁ ₂

Correct answer

A. ₁ < ₂

Step-by-step solution

Fringe width . As given that ₁ produces photo electric effect, so ₁ < ₂ . Hence, ₁ < ₂

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