Recalling the Equation for Slit Width in a Double Slit Interference Experiment

[KBriggs]

Hey all,

I need to get the equation for the slit width in a double slit interference experiment (not the distance between slits) that depends on the angle theta to the intferference maxima, and any distances involved in the typical setup. I found one on the forum that involves the intensity of the maxima, but I have no way to measure intensity. Any help?

 

[vishal_garg]

Hey all,

I need to get the equation for the slit width in a double slit interference experiment (not the distance between slits) that depends on the angle theta to the intferference maxima, and any distances involved in the typical setup. I found one on the forum that involves the intensity of the maxima, but I have no way to measure intensity. Any help?

well do you mean fringe width over here..!if yes then equation goes like this..

W = (Dλ)/S

Where,
W= fringe width
D=distance from slits to screen
λ= WAVELENGTH of light
S=slit separation(distance between the slits)..

I hope this is the formula you were looking for.

 

[KBriggs]

Not the fringe width, but the size of the two slits. ie, the size of the larger gaps in the little diagram here.
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