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Lag1989 task number 21.12
A point light source with a wavelength of 0.5 μm is located at a distance a = 100 cm in front of the diaphragm with a circular aperture of radius r = 1 mm. Find the distance b from the diaphragm to the observation point, for which the number of Fresnel zones in the hole is three.
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Discount for regular customers! If the total of your purchases from the seller
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