What must light pass through, in order to produce the intensity pattern (on a di

Question

What must light pass through, in order to produce the intensity pattern (on a distant screen) shown below? One thin slit Two thin slits Three thin slits Many thin slits (many more than three slits) Light passes through a series of 100 thin slits and produces an intensity pattern on a distant screen. If these 100 slits are replaced by two thin slits (with the same distance between each slit as before), what will happen to the distance between adjacent intensity maxima on the screen? They would get closer together. They would get farther apart. Their positions would not change. Light with wavelength A passes through a diffraction grating with many thin slits. At the location (on a distant screen) of the third bright fringe from the central bright fringe, how much extra path has light from one slit traveled to this location, compared to light from a slit that is two slits away from this slit? lambda 2 lambda 3 lambda 4 lambda 5 lambda 6 lambda

Explanation / Answer

(1)

The intensity pattern is the single slit diffraction. The number of slits can be calcualted if the pattern has n number of secondary maxima between two primary maximum then the number of slits are: n+2.

(2)

The intensity of the intensity pattern beocmes sharper and brighter if the number of slits increased (secondary maxima forms between two primary maxima). But, the separation between the two primary patterns reamains same. The correct option (C).

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