λ₁ and λ₂ are used to illuminate the slits. β₁ and β₂ are the corresponding fringe widths. The wavelength λ₁ can produce photoelectric effect when incident on a metal. But the wavelength λ₂ cannot produce photoelectric effect. The correct relation between β₁ and β₂ is

Options

(a) β₁ (b) β₁ = β₂
(c) β₁ > β₂
(d) β₁ ≥ β₂

Correct Answer:

β₁ Explanation:

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