Question: A double - slit interference experiment is set up in a chamber that can be evacuated. Using monochromatic light,an interference pattern is observed when the

A double

-

slit interference experiment is set up in a chamber that can be evacuated. Using monochromatic light,an interference pattern is observed when the chamber is open to air. As the chamber is evacuated one will notewhich of the following?

1 .

The interference fringes disappear completely.

2 .

The interference fringes remain fixed.

3 .

The interference fringes move farther apart.

4 .

The interference fringes move closer together

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