with the wavelength ratio 1 + z we want 1 + z = 1/2 so v/c = -3/5 c = -0.6c if i calculated correctly (i did this in my head without a napkin), where the source moves away from the observer with velocity v. so it would have to move towards you quite rapidly.
gandalf_der_12te@feddit.org 1 day ago
assuming we want the frequency to double,
going by this formula: en.wikipedia.org/wiki/Redshift
Image
with the wavelength ratio 1 + z we want 1 + z = 1/2 so v/c = -3/5 c = -0.6c if i calculated correctly (i did this in my head without a napkin), where the source moves away from the observer with velocity v. so it would have to move towards you quite rapidly.
Johanno@feddit.org 1 day ago
0.6 *300 000 km/s =180 000 km/s
Slovene85@sh.itjust.works 23 hours ago
How many freedom units is that?