Question

A very distant galaxy has more of a red shift than a distant galaxy because the waves of the light emitted by the galaxy have a

shorter

longer

wavelength.

If the nearby galaxy was to blueshift, then the galaxy would move closer to the galaxyof the laboratory reference. As a result, the wavelengths in the spectrum would move to the


left

right

Answer 1

Answers: longer; left.

Explanation: Redshift means the emitted light is stretched to longer wavelengths. Blueshift means the source is moving toward the observer, so wavelengths get shorter and spectral lines shift toward the blue (toward the left on a usual wavelength axis).