Finding Wavelength of Light

[904914037]

Could anyone please explain how to find the wavelength of a light associated with a change in an electron's every level? I will paste an example below, thank you!

"In the hydrogen atomic spectrum, what is the wavelength of light associated with the n = 2 to n = 1 electron transition?"

[005391550]

You can use the formula

frequency = -R((1/(n1^2)) - (1/(n2^2))

where R is rydberg's constant, n1 would be 2 and n2 would be 1 for that electron transition

and then you can use that frequency to find the wavelength

[Ryan Chang 1C]

Adding on the the post above, wavelength is equal to the speed of light divided by frequency.

[Kassidy Ford 1I]

In lecture Prof Lavelle urges not to use the Rydberg equation if it confuses you but instead to use the H-atom spectrum equation, which is E(n)= -hR/n^2. you do that for both energy states, n=2 and n=1, and then subtract the initial energy from the final energy to get the change in energy. you can then use this energy in the equation wavelength= hc/e to solve for wavelength