How Many Revolutions Does an Electron Make in Hydrogen's First Excited State?

[Jacob87411]

According to the Bohr theory, how many revolutions will an electron make in the first excited state of hydrogen if the lifetime in that state is 10^-8?

Basically do I find the speed of the that the electron moves in this excited state then get the distance that a revolution is and divide it by the time?

 

[dextercioby]

Find the period for the first orbit and then use $10^{-8}s$ and the following reasoning

1 revolution---------------------------->T

x revolutions---------------------------->10^{-8}s

Daniel.

 

[Jacob87411]

Right. When finding the period do I take velocity to be the speed of light?

 

[dextercioby]

No,the velocity on the first orbit

$$v_{I}=\alpha c$$

,where $\alpha$ is the fine structure constant...

Daniel.