2020. 2. 12. 02:32ㆍ카테고리 없음
Every gas shines with its own special colors of light. These colors are like a fingerprint because no two gases give off exactly the same colors. Streetlights filled with sodium gas give off a dark yellow light.
Only sodium atoms give off that particular shade of yellow. Orange neon signs are filled with pure neon gas. Other colors of neon signs are actually neon mixed with other types of gases, like helium or argon.The unique colors of light produced by a gas are called its '. The auroral lights' colors are determined by the spectra of gases in the Earth's atmosphere, and the height at which the most collisions take place. Incoming particles tend to collide with different gases at different heights. Very high in the (above 300 km or 180 miles), oxygen is the most common atom, and collisions there can create a rare red aurora. The strong yellow-to-green light that is most common is produced by collisions with oxygen at lower altitudes, between 100 and 300 km.
The Rare Old Times
Around 100 km, nitrogen molecules produce a red light that often seems to form the lower fringes on aural curtains. If our atmosphere were neon instead of oxygen and nitrogen, what color would auroral lights be? You guessed it, orange!Lighter gases high in the ionosphere, like hydrogen and helium, make colors like blue and purple, but our eyes cannot always see them in the night sky.
Good photographic film can be more sensitive to some colors than our eyes. Eyes see best in the green-yellow-orange part of the spectrum, where the Sun emits most of its light.Right: a curtain aurora with red edges.
.chronology(1999)Rare(1999)(2000)Professional ratingsReview scoresSourceRatingRare is the seventh studio album by British rock band, released in 1999. It was made up of the instrumental music, which keyboard player and guitarist composed for the soundtrack for 's documentary nature film Salmon: Against the Tides (tracks 1–16) and for an unreleased CD-ROM video game (tracks 17–22). 'The Exodus' is an adaptation of the main theme from the film (1960).Rare was recorded at the group's new recording studios, Loco Studios, located in, Wales.
It broke the tradition of naming Asia studio recordings with a word beginning and ending with the letter 'a'. However, the next album, (2001), would still follow this pattern.