In the double slit experiment the two slits are at A and B. Point C is on the sc

Question

In the double slit experiment the two slits are at A and B. Point C is on the screen and on the center line from the midpoint of the slits to the screen. The distance from A to C is thus equal to the distance from B to C. If the distances to another point on the screen, P, are such that the distance from B to P is longer than the distance from A to P by (5/2)lambda where lambda is the wavelength of light used, what is observed at P? an intensity minimum an intensity corresponding to a single slit located halfway between A and B an intensity maximum an intensity intermediate between a maximum and a minimum no interference occurs at P

Explanation / Answer

Since the path difference of the waves is an odd multiple of /2, destructive interference will take place.

So, at P, an intensity minimum will be observed.

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