Scientists with vision professor zohra ben lakhdar, tunisia

摘要

Spectroscopy is about analyzing bodies according to the spectrum of light emitted or absorbed by matter. What does that mean? Think of the planets, stars, galaxies, which are beyond our reach. - How is it that man is able to get information about them and photograph them? It is thanks to light. Light is the messenger of the universe. Light informs us about the state of matter throughout the universe and even about the universe's past.