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# At two points P and Q on screen in Young's double slit experiment,

Question:

At two points $\mathrm{P}$ and $\mathrm{Q}$ on screen in Young's double slit experiment, waves from slits $\mathrm{S}_{1}$ and $\mathrm{S}_{2}$ have a path difference of 0 and $\frac{\lambda}{4}$ respectively. the ratio of intensities at $P$ and $Q$ will be :

(A)

(B)

(C)

(D)

1. $3: 2$

2. $2: 1$

3. $\sqrt{2}: 1$

4.  $4: 1$

Correct Option: , 2

Solution: