Patterns Green Laser
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distance to region?
A pair of narrow, parallel slits separated by a distance of 0.376 mm are illuminated by green laser light with wavelength of l = 556.3 nm. The interference pattern is observed on a screen 1.78 m from the plane of the parallel slits. Calculate the distance from the central maximum to the first bright region on either side of the central maximum
What is the distance between the first and second dark bands in the interference pattern?
i dont know how to start this
Use the formula n*Lambda = d*sin(theta)
n= number of interference pattern
d = distance to screen
lambda = wavelength
theta = angle made by line from slit to interference band.
You can APPROXIMATE it by
n*lambda = D [where D is the distance from the center to the interference band].
To use this formula, know that n=0 is the central max [right behind the center of the two slits], n= 1 will give you the bands on either side of that, n=2 will give you the next set of bands, etc.
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