For equations like E = hf = (hc) / wavelength, variables in both forms of the equation could be asked for that are mutually exclusive of each other. So knowing both would be needed for the purposes of potential MCAT questions. Could you share a source to support the form of the equation you provided? And are there AAMC or other test prep questions that you found referencing this form of the equation? I ask because, if it’s more esoteric than it is applicable to the MCAT, we’d sway away from including it for the sake of sticking to what’s needed for MCAT purposes.