Question: A Youngs double-slit interference experiment gives bright fringes separated by 2.5 cm on a screen when the experiment is performed in air. The entire apparatus

A Young’s double-slit interference experiment gives bright fringes separated by 2.5 cm on a screen when the experiment is performed in air. The entire apparatus is then placed under water (n = 1.33). What is the new spacing between bright fringes? Assume the fringes are near the center of the interference pattern.

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