Main Question or Discussion Point
what does the doppler effect mean for an individual photon? for instance in a blue shift do the photons actually have more energy if they were originally a lower frequency?
I think that is misleading. The ball transfers more or less energy to you because its speed relative to you at impact is higher or lower. that is no true for light, it always hits you at c, but it has more or less energy because of the doppler shift.A baseball flying towards you would transfer a certain amount of energy if it hits you. if you move towards it you will receive more energy if you move along it's direction you will receive less.