Question: When yellow sodium light, = 589nm, falls on a diffraction grating, its first-order peak on a screen 60.0cm away falls 3.32cm from the central peak.

When yellow sodium light, λ = 589nm, falls on a diffraction grating, its first-order peak on a screen 60.0cm away falls 3.32cm from the central peak. What is the wavelength of the new source? How many lines/cm are on the grating?

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We find the angles for the first order from the distances 332 cm tan 317 600 ... View full answer

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