what is the effect on fringe width when light is used of different colour
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In which colour, will the fringe width be maximum and minimum? The derivation of fringe width as compared to wavelength of the light ray used has a direct proportionality relationship.So the color of light having higher wavelength has larger fringe width compared to relative lesser wavelengths.
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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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