Question

2 multiple choice 1 point
which of the following is seen from stars and planets to determine what is currently in their atmosphere?
image of a spectrum
neither of these.
image of spectral lines

Explanation:

Spectroscopy uses absorption (dark lines on a continuous spectrum) or emission spectra to identify atmospheric components. The first image is a continuous spectrum, while the bottom image shows an absorption spectrum (dark lines on a bright background, or the inverse with bright lines on dark, which corresponds to the absorption pattern that reveals atmospheric elements). This type of spectrum is used to detect what gases are present in a star or planet's atmosphere, as specific elements absorb unique wavelengths of light.

Answer:

The option with the spectrum showing dark/bright lines (the bottom image option)