what will be the effect on interference fringes is red light is replaced by blue light
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The wave length of red is 630-750 and blue 450-495 are less than 67% apart so that if fringes do appear it will only be dueti the interference from the two slits
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Explanation:
The fringe width and interference will decrease if if the red light it is replaced by the blue light from the source. This is because blue light wavelength is lower and its intensity is is low when compared to red light. As the wavelength of the light is directly proportional to the fringe width of the wave.
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