I measured the H-alpha wavelength as 7250 angstroms.
The wavelength shift is 7620 - 7250 = 370
Divided by 7250 to get the value of the redshift (z) as 37/725
Does that mean that the speed of the galaxy as a fraction of the speed of light is 5.1%?
Or am I forgetting a step somewhere?
No, not taking astronomy. Trying to explain the concept and math to one of my children, and getting a little confused.
The wavelength shift is 7620 - 7250 = 370
Divided by 7250 to get the value of the redshift (z) as 37/725
Does that mean that the speed of the galaxy as a fraction of the speed of light is 5.1%?
Or am I forgetting a step somewhere?
No, not taking astronomy. Trying to explain the concept and math to one of my children, and getting a little confused.
-
correct