Question
What does it mean when an emission line of helium from a galaxy is shifted toward red?(1 point)
Responses
The galaxy contains a small percent of hydrogen.
The galaxy contains a small percent of hydrogen.
The galaxy is moving away from the viewer.
The galaxy is moving away from the viewer.
The galaxy contains a large percent of hydrogen.
The galaxy contains a large percent of hydrogen.
The galaxy is moving toward the viewer.
Responses
The galaxy contains a small percent of hydrogen.
The galaxy contains a small percent of hydrogen.
The galaxy is moving away from the viewer.
The galaxy is moving away from the viewer.
The galaxy contains a large percent of hydrogen.
The galaxy contains a large percent of hydrogen.
The galaxy is moving toward the viewer.
Answers
GPT-4o mini
When an emission line of helium from a galaxy is shifted toward red, it means:
**The galaxy is moving away from the viewer.**
This phenomenon is known as redshift, which occurs when an object emitting light is moving away from an observer, causing the wavelengths of the emitted light to stretch and shift toward the red end of the spectrum.
**The galaxy is moving away from the viewer.**
This phenomenon is known as redshift, which occurs when an object emitting light is moving away from an observer, causing the wavelengths of the emitted light to stretch and shift toward the red end of the spectrum.