Question

the light given off by an electric discharge through sodium vapor is ________.
○ an emission spectrum
○ a continuous spectrum
○ white light
○ of a single wavelength

Explanation:

When an electric discharge passes through sodium vapor, sodium atoms emit light at specific wavelengths. This is characteristic of an emission spectrum. A continuous spectrum has all wavelengths, white light is a combination of many wavelengths, and sodium vapor doesn't emit just a single wavelength (it has a doublet in the yellow region).

Answer:

an emission spectrum