Physics-

General

Easy

Question

# Figure here shows P and Q as two equally intense coherent sources emitting radiations of wavelength 20 m. The separation PQ is 5.0 m and phase of P is ahead of the phase of Q by 90^{o}. A, B and C are three distant points of observation equidistant from the mid-point of PQ. The intensity of radiations at A, B, C will bear the ratio

- 0 : 1 : 4
- 4 : 1 : 0
- 0 : 1 : 2
- 2 : 1 : 0

## The correct answer is: 2 : 1 : 0

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