Question

Based on the interactive, which of the following statements could represent something we learn from astronomical spectra?

Choose one or more:A.We can determine a reddish nebula is made up of mostly hydrogen gas by observing its emission spectrum.

B.We can determine the magnetic field strength of the inside of a star by observing its continuous spectrum.

C.By simply observing an absorption or emission spectrum, we know the light was interacting with atoms in a low-density gas.

D.We can determine the mass of a star by how it changes its continuous spectrum.

E.We can detect how the water vapor in Earth's atmosphere changes the spectra of starlight passing through the atmosphere, adding absorption lines to it.

Answer 1

ANSWER :

A.We can determine a reddish nebula is made up of mostly hydrogen gas by observing its emission spectrum

The emission spectra from a reddish nebula is similiar to that of the spectral line radiation from an excited gas like hydrogen

B.  We can determine the magnetic field strength of the inside of a star by observing its continuous spectrum

The atoms in a stars atmosphere will absorb certain frequencies of energy in the electromagnetic spectrum producing absorption lines in the spectrum. When the atoms are within a magnetic field , these lines split into multiple closely spaced lines ( Zeeman effect). Depending on the orientation of the magnetic field, the energy will get polarized