In Young’s double slit experiment, the fringe width of the interference pattern produced on the screen is 2.4

Question

In Young’s double slit experiment, the fringe width of the interference pattern produced on the screen is 2.4 $μm$ . If the experiment is carried out in another medium having refractive index 1.2, the fringe width will be ____ $μm$ . [2026]

Smart Achievers · Accepted Answer

(2)

$Since fringe width in a medium becomes$

$β' = \frac{β}{μ}$ $(Here β = \frac{λ D}{d})$

$β' = \frac{β}{μ} = \frac{2.4}{1.2} = 2 μ m$

Solution

Q.
In Young’s double slit experiment, the fringe width of the interference pattern produced on the screen is 2.4 $μm$ . If the experiment is carried out in another medium having refractive index 1.2, the fringe width will be ____ $μm$ . [2026]

1 1.2

2 2

3 2.4

4 2.88

Ans.
(2)

$Since fringe width in a medium becomes$

$β' = \frac{β}{μ}$ $(Here β = \frac{λ D}{d})$

$β' = \frac{β}{μ} = \frac{2.4}{1.2} = 2 μ m$

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