Question

Edwin Hubble used his telescope to show that when galaxies are moving away from us, they give off red light.

True

False

Answer 1

False, the light is not red but more red than when it was sent out by those distant galaxies. This is called redshift. Because those distant galaxies are moving away from us we observe a redshift in the light the emit (the frequency decreases and wavelength increases)

Answer 2

thank

Answer 3

You're welcome. Just discovered this site. I really love it!

Answer 4

cool