CHEMISTRY COMMUNITY

I understand that 400-700 is when light is visible and what the spectrum means. I'm just confused on how this applies to calculating frequency or energy? Or is it more conceptual?

I think it is more conceptual, but also has to do with calculating the distances between spectral lines as was explained through the sketch during the last lecture. Visible light has smaller gaps between lines whereas ultraviolet has ones farther apart so the value of change in E is greater.

I think in the future, we may be asked what color a specific wavelength of light given off is (i.e if an electron emits a photon with a wavelength of 400, what color is the light?)

Well, it is relevant in that visible light corresponds to the Balmer series. So, when we are given the wavelength of emitted light (and it is in the visible portion of the spectrum) and we have to find the initial and final n, we know that the final n is 2. And we can get the energy and frequency from the wavelength with the E=hv and c=λv equations.