Monochromatic
light passes through two parallel narrow slits and forms an interference
pattern on a screen. As the distance between the two slits is <span>decreased,
the distance between light bands in the pattern on the screen will decrease.
The answer is letter A.</span>
The distance between the light bands and the distance between the two slits, are related as follows:
Here, y is the distance between light bands in the pattern, m is the number of light bands observed in the pattern, is the light's wavelenght, D is the distance between the two slits and the screen where the pattern is observed and d is the distance between the two slits. Thus, as the distance between the two slits is decreased, the distance between light bands will increase.
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