7. Fresnel's diffraction : Numerical problem | circular aperture (2020)
Channel: Learndiyphysics
Date: 2020-06-26

Light of wavelength 600 nm normally falls on a circular aperture of radius 3 mm. Calculate the number os fresnel's zones it can accommodates if screen is kept at a distance of 3m. Also predict whether centre of the pattern would be dark or bright.
Ans: No. of zones 5, bright.

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