Important Notice: Our web hosting provider recently started charging us for additional visits, which was unexpected. In response, we're seeking donations. Depending on the situation, we may explore different monetization options for our Community and Expert Contributors. It's crucial to provide more returns for their expertise and offer more Expert Validated Answers or AI Validated Answers. Learn more about our hosting issue here.

In the relativistic Dopper shift, which frame is and which is , and which is proper time? Why is that one proper?

frame relativistic shift time
0
Posted

In the relativistic Dopper shift, which frame is and which is , and which is proper time? Why is that one proper?

0

This is worth some careful attention. There are two frames here: the frame of the source of light, , and that of the observer moving at speed towards the source, the observer frame . The source emits light with some frequency : the light wavefronts are emitted in the same place (at the source) in the source’s frame , so the frequency in is the proper frequency, . Now, still in the source’s frame, consider the time interval between the observer hitting one wavefront, and hitting the next wavefront. That time interval is , seen in the source’s frame.

Thanksgiving questions

*Sadly, we had to bring back ads too. Hopefully more targeted.