Question
What does it mean when an emission line of helium from a galaxy is shifted toward red?(1 point)
Responses
The galaxy is moving away from the viewer.
The galaxy is moving away from the viewer.
The galaxy contains a small percent of hydrogen.
The galaxy contains a small percent of hydrogen.
The galaxy is moving toward the viewer.
The galaxy is moving toward the viewer.
The galaxy contains a large percent of hydrogen.
Responses
The galaxy is moving away from the viewer.
The galaxy is moving away from the viewer.
The galaxy contains a small percent of hydrogen.
The galaxy contains a small percent of hydrogen.
The galaxy is moving toward the viewer.
The galaxy is moving toward the viewer.
The galaxy contains a large percent of hydrogen.
Answers
GPT-4o mini
The correct response is:
**The galaxy is moving away from the viewer.**
A redshift in the emission line indicates that the light from the galaxy is stretched to longer wavelengths, which is consistent with the Doppler effect associated with the galaxy moving away from us.
**The galaxy is moving away from the viewer.**
A redshift in the emission line indicates that the light from the galaxy is stretched to longer wavelengths, which is consistent with the Doppler effect associated with the galaxy moving away from us.