2015年6月2日 (二) 03:35 Shen

2015-06-02T03:35:45Z

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			*H-alpha has a wavelength of 656.281 nm;
	~~H-alpha has a wavelength of 656.281 nm,[1] is visible in the red part of the electromagnetic spectrum, and is the easiest way for astronomers to trace the ionized hydrogen content of gas clouds.~~ Since it takes nearly as much energy to excite the hydrogen atom's electron from n = 1 to n = 3 as it does to ionize the hydrogen atom, the probability of the electron being excited to n = 3 without being removed from the atom is very small. Instead, after being ionized, the electron and proton recombine to form a new hydrogen atom. In the new atom, the electron may begin in any energy level, and subsequently cascades to the ground state (n = 1), emitting photons with each transition. Approximately half the time, this cascade will include the n = 3 to n = 2 transition and the atom will emit H-alpha light. Therefore, the H-alpha line occurs where hydrogen is being ionized.		*Since it takes nearly as much energy to excite the hydrogen atom's electron from n = 1 to n = 3 as it does to ionize the hydrogen atom, the probability of the electron being excited to n = 3 without being removed from the atom is very small. Instead, after being ionized, the electron and proton recombine to form a new hydrogen atom. In the new atom, the electron may begin in any energy level, and subsequently cascades to the ground state (n = 1), emitting photons with each transition. Approximately half the time, this cascade will include the n = 3 to n = 2 transition and the atom will emit H-alpha light. Therefore, the H-alpha line occurs where hydrogen is being ionized.

Shen：创建页面，内容为“H-alpha has a wavelength of 656.281 nm,[1] is visible in the red part of the electromagnetic spectrum, and is the easiest way for astronomers to trace the ionized hy...”

2015-06-02T03:30:53Z

创建页面，内容为“H-alpha has a wavelength of 656.281 nm,[1] is visible in the red part of the electromagnetic spectrum, and is the easiest way for astronomers to trace the ionized hy...”

新页面

H-alpha has a wavelength of 656.281 nm,[1] is visible in the red part of the electromagnetic spectrum, and is the easiest way for astronomers to trace the ionized hydrogen content of gas clouds. Since it takes nearly as much energy to excite the hydrogen atom's electron from n = 1 to n = 3 as it does to ionize the hydrogen atom, the probability of the electron being excited to n = 3 without being removed from the atom is very small. Instead, after being ionized, the electron and proton recombine to form a new hydrogen atom. In the new atom, the electron may begin in any energy level, and subsequently cascades to the ground state (n = 1), emitting photons with each transition. Approximately half the time, this cascade will include the n = 3 to n = 2 transition and the atom will emit H-alpha light. Therefore, the H-alpha line occurs where hydrogen is being ionized.

Halpha - 版本历史

2015年6月2日 (二) 03:35 Shen

Shen：​创建页面，内容为“H-alpha has a wavelength of 656.281 nm,[1] is visible in the red part of the electromagnetic spectrum, and is the easiest way for astronomers to trace the ionized hy...”

Shen：创建页面，内容为“H-alpha has a wavelength of 656.281 nm,[1] is visible in the red part of the electromagnetic spectrum, and is the easiest way for astronomers to trace the ionized hy...”