If we increase the wavelength (λ), fringe width will increase and the interference pattern on the wall will spread out.
The double or two-slit interference is a demonstration that light and matter can display characteristics of both classically defined waves and particles.
It also displays the fundamentally probabilistic nature of quantum mechanical phenomena.
During a two-slit interference experiment, a beam of light is aimed at a barrier with two vertical slits.
fringe width = λ L / D
where;
Thus, if we increase the wavelength (λ), fringe width will increase and the interference pattern on the wall will spread out.
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