say c = 3 * 10^8
so v = 1.5* 10^8
moving away so looks longer
delta lambda/ lambda = v/c
d L = 500 nm (.5) = 250 nm
so
250 + 500 = 750 nm
An object emitting 500nm wavelength light moves away from you at half of the speed of light. What is the observed wavelengths of the light?
1 answer