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A single slit of width 2.4 um (micrometers) is illuminated by red light of wavelength
700 nm (nanometers). A screen is placed 4.0 m beyond the slit.
a) What is the linear width (edge to edge) of the central diffraction maximum that
appears on the screen?
b) What is the linear width of the first maximum to the side of the central one?

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