Hi, If I'm moving away from a light source flashing light, according to Doppler effect I would have more time between flashes from my perspective than a still observer from perspective of the source, my explanation would be that the source really waits this exact time, and I can relate it to a clock fixed on the source . According to the source it's flashing every 3 sec for instance on the fixed clock, and it's same for me and since I would feel that this moving clock " from my perspective is dilating " then I will have more time between flashes What if I am moving toward the source emitting light ?? I want to use same clock but according to time dilation I should receive flashes and estimate time between them more than a person by the source will estimate time between emitting which is 3 sec on his clock , but Doppler effect is said to make time less not more ! that's where I get confused.