Monochromatic light passes through two parallel narrow slits and forms an interference pattern on a screen. as the distance between the two slits is decreased, the distance between light bands in the pattern on the screen will
a. decrease.
b. increase.
c. remain the same.

b.increase.

Explanation:

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.

some think that theories become laws, but theories and laws have separate and distinct roles in the scientific method. a law is a description of an observed phenomenon in the natural world that hold true every time it is tested. it doesn't explain why something is true; it just states that it is true.

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