Question
The yellow light from a sodium vapor lamp seems to be of pure wavelength, but it produces two first-order maxima at $36.093^\circ$ and $36.129^\circ$ when projected on a 10,000 line per centimeter diffraction grating. What are the two wavelengths to an accuracy of 0.1 nm?
$589.1 \textrm{ nm}$
$589.6 \textrm{ nm}$
Solution Video