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When a light source with wavelength of 500 nm is normally incident to a plate with...

When a light source with wavelength of 500 nm is normally incident to a plate with a single slit, the central diffraction maximum observed on a screen that is 2.95 mm  behind the plate has a width w. The incident light is then changed to a source with wavelength of 632 nm. How far behind the plate should the screen now be placed in order to obtain the same width w for the central diffraction maximum?

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