What type of fusion occurs in the red giant phase of the star life cycle? How do we know?

1 Answer
Jul 2, 2016

Nuclear fusion, its the only kind existent in stars. Spectrographs tell us that.


The enormous mass of stars causes a nuclear fusion first of the hydrogen atoms and then of the helium atoms.

We know because every atom vibrates at a different rate which send out light at that vibration rate (frequency).


The chart above shows the part of the light spectrum associated with each element.