Question

In week 6 we learned what the line emission and absorption spectra are. These are very useful in astronomy. Do some research about how astronomers use different types of spectra to learn more about our universe and share your findings with your group.

Answer 1

Spectroscopy can be very useful in helping scientists understand how an object like a black hole, neutron star, or active galaxy produces light, how fast it is moving, and what elements it is composed of. Spectra can be produced for any energy of light, from low-energy radio waves to very high-energy gamma rays. Each different type of atom or ion has its own special, unique set of emission lines. Astronomers use these emission lines to identify the atoms or ions that send out light from the Sun and stars. This is similar to the way a detective uses fingerprints to determine whose hands have touched an object.