What two physical effects, are required in order to understand how we measure the speed at which galaxies are moving away from us in the Universe?
Best guess what your teacher is looking for:
Speed of Light
Doppler shift of the wavelengths of light from the galaxy (Red Shift)
I could be wrong, but that is all I need.
February 5th, 2010 at 4:24 am
Best guess what your teacher is looking for:
Speed of Light
Doppler shift of the wavelengths of light from the galaxy (Red Shift)
I could be wrong, but that is all I need.
References :