Radio Telescopes; the EM-Wave Application which Show Us Invisible Light from Space.

Abstract — I choose ‘Radio Astronomy ’ as my topic, because I think that students who specialized in electrical and electronical engineering, are farmilier with other topics(several communications using EM wave, microwave oven, vision, GPS, radar and etc). Then, I did want to challenge somewhat fresh topic. Stars radiate not only visible light but also light of invisible wavelength region. Then, we can get more information about stars from these invisible light by radio telescopes. For that reason, I will approach the topic ‘Radio Astronomy ’ with radio telescopes. I