what will change if we change the shape of the screen in youngs double split experiment
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The spacing between two bright fringes in the interference pattern produced by two-slit is given by
Δx=λDd
D:distance to the screen
d:separation of the two slits
λ:wavelength of the light
Δx:fringe spacing
Therefore we see that
The spacing is inversely proportional to the separation of the two slits and proportional to the wavelength.
Increasing d will decrease Δx
Switching from red to blue, means switching from a longer wavelength to a shorter wavelength, so Δx will decrease.
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