Multiple choice general knowledge science & technology Scientist who explained the presence of Spectral Lines Meghnad Saha Hari Gobind Khorana Shanti Swarup None Reveal answer Fill a bubble to check yourself A Correct answer Explanation Meghnad Saha formulated the Saha ionization equation (1920), which explained the presence of spectral lines in stellar spectra based on temperature and pressure conditions. This was a fundamental contribution to astrophysics.