I need a brief (short) good explantion for these two questions. Double Slit Inte

Question

I need a brief (short) good explantion for these two questions.

Double Slit Interference:

1. Does the distance between interference maxima increase, descrease or stay the same when the slit seperation is increased? Explain with reference to your data and theory?

data set 1: slit seperation=0.25mm D=96.7cm slit width=0.04mm distance for left max=11.372cm(m=1) right mx=11.841cm vs. left max=11.103cm and right max=12.104cm (m=2)

data set 2: slit seperation=0.50mm D96.7cm slit width=0.04mm distance for left max=11.532cm(m=1) and right max=11.781cm vs left max=11.411cm and right max=11.910cm (m=2)

2. Does the distance between interference maxima increase, decrease or stay the same when the slit width is increased? Explain with reference to your data and your understanding of the theory?

Explanation / Answer

1)

as the distance between the maxima is given as

y = D *wavelength /d

Now, when slit seperation , d is increased

y will decrease.

hence , the distance between the interference maximas will decrease.

2)

Now, for the single slit also ,

y = D *wavelength /d

Now, when slit seperation , d is increased

y will decrease.

hence , the distance between the interference maximas will decrease.

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