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In a double slit experiment with monochromatic light, fringes are obtained on a screen placed at some distance from the plane of slits. If the screen is moved by 5 × 10 - 2 m towards the slits, the change in fringe width is 3 × 10 - 3 cm . If the distance between the slits is 1 mm , then the wavelength of the light will be____ nm .

Correct answer

0

Step-by-step solution

We know that the fringe width in YDSE is β = λ D d ⇒ Δ β = λ d Δ D ⇒ λ = Δ β d Δ D = 3 × 10 - 3 × 10 - 2 × 10 - 3 5 × 10 - 2 = 6 × 10 - 7   m = 600   nm

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