Light of wavelength 75x10-7 meter in air is incident, Ask an Expert

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Light of wavelength 7.5x10^-7 meter in air is incident normally (perpendicularly) on a double slit. The distance between the slits is 5.9x10^-4 meter, and the width of each slit is negligible. Bright and dark fringes are observed on a screen 2.1 meters away from the slits.

a. Calculate the distance between two adjacent bright fringes on the screen.

The entire double slit apparatus, including the slits and the screen, is submerged in water, which has an index of refraction 1.3.

b. Determine each of the following for this light in water.

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