The line observed in the sample hydrogen spectrum are due to emission of?
Answer Details
The line observed in the sample hydrogen spectrum are due to the emission of energy by electron transition. When an electron moves from a higher energy level to a lower energy level, it releases energy in the form of light. This light is observed as a spectral line in the hydrogen spectrum. The different lines in the spectrum correspond to different energy transitions between the electron levels in the hydrogen atom. Therefore, the correct option is "energy by electron transition". The other options are not correct as they do not explain the observed spectral lines in the hydrogen spectrum.