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

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In summary, the individual is seeking an equation for the slit width in a double slit interference experiment, which is dependent on the angle theta to the interference maxima and other distances involved in the setup. They found one equation on a forum but it involved measuring intensity, which they are unable to do. Another individual responds with a formula for the fringe width, but the person seeking help clarifies that they are looking for the size of the individual slits in the setup.
  • #1
KBriggs
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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?
 
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  • #2
KBriggs said:
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 seperation(distance between the slits)..

I hope this is the formula you were looking for.
 
  • #3
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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FAQ: Recalling the Equation for Slit Width in a Double Slit Interference Experiment

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