The concept required to solve the given question is slit width in the Young’s experiment.
Initially, convert the wavelength form nm to m. Finally, calculate the separation of the two slits by rearranging the equation obtained from the Young’s double slit experiment.
The expression for the Young’s double slit experiment is as follows:
Here, n is the order of diffraction, d is the separation of the two slits, D is the distance from the slits to the screen, is the wavelength, Y is the distance of the fringe from the central bright fringe.
The wavelength in nm is as follows:
Convert the wavelength in m as follows:
Rearrange the equation for d as follows:
Substitute 20 for n, for , 10.4 mm for Y, and 1.35 m for D in the equation .
Ans:
The magnitude of the separation of the two slits is 1.30 mm.
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