In a double-slit experiment, the slit spacing is 0.120 mm and the screen is 2.00 m from the slits. Find the wavelength (in nm) if the distance between the central bright region and the third bright fringe on a screen is 2.75 cm.

Explanation:

From the question we are told that:

The slit spacing

Screen distance

Third Distance  

Generally the equation for Wavelength is mathematically given by

Where

n=number of screens

Therefore

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