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Lec 36 | MIT 8.02 Electricity and Magnetism, Spring 2002
sun, that ratio is about 10 to the -7. So you must conclude that the sun emits largely optical light and infrared and that the amount of x-rays is a modest byproduct. Interesting as it is all by itself. In 1962 several scientists here in Cambridge, Massachusetts, among them Bruno Rossi and Riccardo Giacconi and Herb Gursky, made an attempt to observe x-rays from stars outside our solar system. The odds were strongly against them. The detectors were not sensitive enough. If you take the sun ...
Lec 30 | MIT 8.02 Electricity and Magnetism, Spring 2002
here. I'm going to send unpolarized light up here, straight up. We have bright spotlights there, and the light goes straight up. In here, I'm going to put very small dust particles. And I have decided to do that smoke, simply cigarette smoke. So I'm going to hold cigarette smoke in these beams, and the light that will come to you, no matter where you sit, must have scattered closely over 90 degrees, right? It comes up like this, but if you see it, almost for everyone in the audience, 90 ...