- #1

bobie

Gold Member

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## Main Question or Discussion Point

Hi,

I am trying to learn the origins of the Hydrogen spectral series.

http://hyperphysics.phy-astr.gsu.edu/hbase/hframe.html

I found that H-α has wavelength 656.28525 nm that corresponds to 1.8892 eV (the PE difference from energy levels 3 and 23.4 - 1.511)

but the electron needs a similar amount of KE, falling from r = 4.76 to 2.12 x 10^-7 cm.) and increasing its speed

- where does it get it from?

- why the KE gain is equal to the E of emitted photon?

- can we calculate/ measure the time it takes to move from one level to the other?

- does the electron keep circling while falling?

Thanks

I am trying to learn the origins of the Hydrogen spectral series.

http://hyperphysics.phy-astr.gsu.edu/hbase/hframe.html

I found that H-α has wavelength 656.28525 nm that corresponds to 1.8892 eV (the PE difference from energy levels 3 and 23.4 - 1.511)

but the electron needs a similar amount of KE, falling from r = 4.76 to 2.12 x 10^-7 cm.) and increasing its speed

- where does it get it from?

- why the KE gain is equal to the E of emitted photon?

- can we calculate/ measure the time it takes to move from one level to the other?

- does the electron keep circling while falling?

Thanks

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