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spectral line Videos

Thermonuclear Fusion With audio commentary
into helium. The protons in the tube travel in spiral paths up and down the tube and reach energies as high as 400 KeV which is equivalent to 420 million K. This is hot enough for the higher energy process of 4 P=He to take place. The change to yellow at the end could be due to the release of sodium vapour from the wall of the tube or the spectral glow of helium but the green line diagnotic of helium is also present indicating that helium was generated. ... Thermonuclear Fusion Transmutation ...
1 - The History Of Our Universe Made Easy (Part 1)
set of wavelengths. We can see these absorptions patterns as lines when we look through an instruments called a spectroscope. This one shows the spectral lines of three elements that were very familiar to early 19th century scientists: Hydrogen, Lithium and Oxygen. But when the French astronomer Pierre Janssen pointed a spectroscope at the Sun, in 1868, he found a set of spectral lines no one had ever seen before. It was a completely unknown element. He called it Helium, after the ...
Cosmos - 10: The Edge of Forever 3/6
been captured on these tiny glass slides. Humason and Hubble had discovered the big bang. At top and bottom are calibration lines... ...that Humason had earlier photographed. In the middle is the spectrum of a relatively nearby galaxy. Every element has a characteristic spectral fingerprint... ...a set of frequencies where light is absorbed. Prominent here are two dark lines in the violet... ...due to calcium in the atmospheres... ...of the hundreds of billions of stars... ...that ...
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