In Young's double slit experiment, the intensity of light at a point on the

Question

In Young's double slit experiment, the intensity of light at a point on the screen where the path difference is

λ

is K unit;

λ

being the wavelength of light used. The intensity at a point where the path difference is

\frac{λ}{4}

will be:

Options:

A . K4

B . K2

C . K

D . zero

Answer: Option B
:
B

K_{1} = I + I + 2 I c o s δ

K_{1} = 2 I, K_{1} = \frac{K}{2}

For path difference

\frac{λ}{4}

, phase difference,

δ = \frac{2 π}{λ} . \frac{λ}{4} = \frac{π}{2}

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