A distant galaxy exhibits an emission line at 660 nm that corresponds to a laboratory…

PHYSICS · Subjective · AP · Physics 2: Algebra-based · Waves Sound and Physical Optics · Waves Sound and Physical Optics

Problem

A distant galaxy exhibits an emission line at 660 nm that corresponds to a laboratory wavelength of 656 nm for a known hydrogen transition. Assuming the wavelength shift is entirely due to the Doppler effect for speeds much less than cc, calculate the recessional speed of the galaxy.

Related theory

Browse the problem library