Good morning everybody, here's a problem about excitations energy of the core level of a Sn atom. It says to construct the scheme of the core levels of Sn indicating the excitations energies. Now the K edge (the problem doesn't say we are necessarily talking about X-rays, but I think we are because of this notation) is at λ=0.425 A and the first two lines are Kα=0.517 A and Kβ=0.437 A. (A is for "angstrom": 10^-10 m) Now shouldn't the excitations energies be just hc/λ ? Probably I actually didn't understand what Kα and Kβ are. I think they are the wavelengths of the emissed photoelectrons due to X-ray, but i'm probably wrong. Who can help me? Thanks.