How might the difference in the brightness of spectral lines be explained?

Answer 1

either

a) "jump" from a lower energy level to a higher energy level. -=NOT THIS ONE=-

b) "jump" from a higher energy level to a lower energy level.

c) "jump" from a ground state to an excited state.

d) None of the Above

Answer 2

Different quantities of the materials producing the lines.
Some lines are weaker because the electron transitions producing them are less likely.
Some lines are stronger or weaker depending upon the temperature of the material producing the lines (a big issue in determining stellar spectral classes).

Different quantities of the materials producing the lines. Some lines are weaker because the electron transitions producing MORE?The distribution of photon energies, which have a peak at a wavelength that depends on temperature (ref. 1).
Also differing amounts or concentrations of the elements responsible for those lines.

Answer 3

Every element has a unique spectra that it emits. Certain lines are brighter than others because the electrons in that substance emit that particular frequency at a greater rate than others.

Answer 4

the brightness of spectral lights are different, the brighter the line, the more photon shots.

Answer 5

They have to connect atoms to cause a chemical reaction