Recent content by Patrick Watson

I sincerely thank all my new found colleagues for their replies. Regards, Patrick.

Thanks. I would be very happy to understand what properties of the star effect the departed photon such that there is a change in the beginning wavelength.

Thanks for your responses. I do not deny current wisdom.The point I have tried to make is, in the specific situation noted, I will measure the wavelength of a single photon. How could this photon, having departed the star, and moving at light speed, be affected by any motion of that star?

I am currently capturing and analyzing spectra. My analysis software includes allowances for Doppler shifts resulting from relative radial motion between source and observer, and also Earth’s rotation. Results are accurate . The basic introduction to the Doppler effect generally starts with...