A Double-Slit Interference Experiment Is Performed in the Air

question 75

Multiple Choice

A double-slit interference experiment is performed in the air. Later, the same apparatus is immersed in benzene (index of refraction, n = 1.50) , and the experiment is repeated. When the apparatus is in benzene, you observe the interference fringes to be

• A) more closely spaced as when the apparatus is in air.
• B) equally spaced as when the apparatus is in air.
• C) more widely spaced as when the apparatus is in air.
• D) Impossible to tell without knowing the wavelength of light in use.
• E) Impossible to tell without knowing the separation between the slits.