A plane monochromatic light wave falls normally on a round aperture At a distance b 9 0 m from it there is a screen showing a certain diffraction pattern The aperture diameter was decreased 3 0 times Find the new distance b ' at which the screen should be positioned to obtain the diffraction pattern similar to the previous one but diminished tithes

Question: A plane monochromatic light wave falls normally on a round aperture. At a distance b = 9.0 m from it there is a screen showing

A plane monochromatic light wave falls normally on a round aperture. At a distance b = 9.0 m from it there is a screen showing a certain diffraction pattern. The aperture diameter was decreased η = 3.0 times. Find the new distance b' at which the screen should be positioned to obtain the diffraction pattern similar to the previous one but diminished η tithes.

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