A Double-Slit Interference Experiment Is Performed in the Air

question 56

Multiple Choice

A double-slit interference experiment is performed in the air. Later, the same apparatus is immersed in benzene (which has an index of refraction of 1.50) , and the experiment is repeated.
When the apparatus is in benzene, you observe that the interference fringes are

• A) equally spaced as when the apparatus is in air.
• B) more closely spaced than when the apparatus is in air.
• C) more widely spaced than when the apparatus is in air.

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