an absorption spectrum of oxygen is shown below. what is most likely the emission spectrum of oxygen?

Answer:

The emission spectrum of an element has lines at the same wavelengths as its absorption spectrum. So, the emission spectrum of oxygen will have bright - lines at the positions where the absorption spectrum has dark - lines. Without seeing the specific options clearly labeled, the general principle is that the emission spectrum is the "reverse" in terms of line appearance (bright lines instead of dark lines at the same wavelengths).

Explanation:

Step1: Recall spectral relationship

Absorption and emission spectra of an element are related.

Step2: Understand line nature

Absorption has dark lines, emission has bright lines at same wavelengths.