Spectra of Hydrogen and Helium (Picture I) Kimmo Huosionmaa The most modern radar technology bases the same technology, what is used in the radio astronomy. One of the most interesting parts of this technology is so-called radio-spectrometer, what is used to determine the elements what is in some target. Those echoes can be separated by using Prisma or hila, what would help to get the spectrum visible. And the black lines in the spectrum are caused by the elements, what is sending the radiation. Radio-spectrometer works like normal spectrometer, what would send to the laser-ray to the target, and then every atom would send the radiation in their unique frequency. Every element in the universe has the own frequency of electromagnetic radiation, and that would help to detect the elements what the target consists. The radio spectrometer would work in the same way, but the echo, what the elements would give are coming in the radio-frequency, but the methodology that is used is ...