For two narrow coherent slits separated by a distance

PHYSICS · Single correct · A Level · Physics · Waves · Waves

Problem

For two narrow coherent slits separated by a distance dd, the exact path difference Δx\Delta x between the light waves reaching a point PP on a distant screen at an angle θ\theta from the central line is (a) d θd\,\theta (b) d tan⁡θd\,\tan\theta (c) d sin⁡θd\,\sin\theta (d) d2 sin⁡θ\dfrac{d}{2}\,\sin\theta

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