If you know the wavelength of light emitted by a laser how can you know

[kashiark]

Homework Statement

How can you know "the difference between the two lasing energy levels?"

Homework Equations

n(lambda) = 2(pi)r
E = hf
mvr = n(h-bar)

The Attempt at a Solution

no clue

 

[kuruman]

You know that E = hf. How is the the frequency related to the wavelength?

 

[kashiark]

I know how to find the energy of the given wavelength, but how do I find the other lasing energy level? What is a lasing energy anyway, and why are there 2?

 

[kuruman]

You are looking for the difference between energy levels. How is the difference related to the emitted photon energy?

 

[aabdella]

If u r talking abt 2 levels laser, then the emitted photon energy is the same as the difference between th two lasing levels

 

[kashiark]

The two are equivalent; so the lasing energy levels are just the levels that the electrons jump to release the photon?

 

[kuruman]

Yup.

 

[kashiark]

That's simple enough; I was just confused over the terminology; thanks!