Who can help me for the below question?
" Hydrogen is the most abundant element in all stars. However, neither absorption nor emission lines due to neutral hydrogen are found in the spectra of stars with effective temperatures higher than 25000K. Account for this observation."

Question

Who can help me for the below question?
" Hydrogen is the most abundant element in all stars. However, neither absorption nor emission lines due to neutral hydrogen are found in the spectra of stars with effective temperatures higher than 25000K. Account for this observation."

unklerhaukus · Answer

If there is no neutral hydrogen in these cases, you have a red giant

anonymous · Answer

can you give me more detail about method with quantum or hydrogenic gas? thanks~

unklerhaukus · Answer

A telescope and a  spectroscope could be used to determine the spectra of the stellar object