To find the second minimum in single slitdiffraction into ho

To find the second minimum in single slit-diffraction, into how many zones do we split the slit?

   1

   2

   3

   4

   5

   6

To determine the type of interference at a point on the viewing screen, which is done?

   We pair the ray from the top of one zone with the ray from the top of the adjacent zone and then determine their difference in angle to the point on the screen.

   We pair the ray from the top of one zone with the ray from the bottom of the adjacent zone and then determine their difference in angle to the point on the screen.

   We pair the ray from the top of one zone with the ray from the bottom of the adjacent zone and then determine their path length difference.

   We pair the ray from the top of one zone with the ray from the top of the adjacent zone and then determine their path length difference.

In a phasor diagram for diffraction, what part of the pattern corresponds to the situation where the head of the last phasor meets the tail of the first phasor?

   central maximum

   one of the side maxima

   one of the minima

As we move along the diffraction pattern away from the central maximum, what happens to the intensity of the maxima?

   decreases

   increases

   remains the same

and Why?

Solution

1)

4 zones

2)

We pair the ray from the top of one zone with the ray from the bottom of the adjacent zone and then determine their path length difference.

3)

one of the minima

4)

decreases

For any value of N,the decreases in intensity in maxima to the left and right of the central maxima.

Where N is no of spilts.