Answered: 40. || Helium atoms emit light at… | bartleby

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40. || Helium atoms emit light at several wavelengths. Light from
a helium lamp illuminates a diffraction grating and is observed
on a screen 50.00 cm behind the grating. The emission at wave-
length 501.5 nm creates a first-order bright fringe 21.90 cm from
the central maximum. What is the wavelength of the bright
fringe that is 31.60 cm from the central maximum?

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