The Doppler Effect

How is Galaxy A moving relative to Earth? It is stationary relative to Earth. It is moving away from Earth. It is moving toward Earth. How is Galaxy B moving relative to Earth? It is stationary relative to Earth. It is moving away from Earth. It is moving toward Earth. Which galaxy is moving faster relative to Earth? Galaxy A Galaxy B Neither The diagram shows the absorption lines in a spectrum from a distant star compared to those in a spectrum from a laboratory sample. How is the star moving relative to Earth? It is stationary relative to Earth. It is moving away from Earth. It is moving toward Earth. An astronomer looks at the absorption lines in the spectrum of light coming from a distant galaxy. He identifies the absorption lines of hydrogen, which makes up most of the galaxy. He then compares these lines to the same absorption lines from a laboratory sample. His results are shown in the diagram.How is the galaxy moving in relation to Earth? It is stationary relative to Earth. It is moving away from Earth. It is moving toward Earth. The light emitted from two galaxies, A and B, is observed and the spectral lines in each are shifted toward the red end of the spectrum. Galaxy A is observed to have a greater redshift than Galaxy B. Which galaxy is moving faster away from Earth? Galaxy A Galaxy B Neither An astronomer looks at the spectrum of light coming from a distant star. He notices that the spectral lines in the spectrum have been shifted toward the blue end of the spectrum. Is the star moving toward or away from the astronomer? The star is moving toward the astronomer. The star is moving away from the astronomer. The star is stationary with respect to the astronomer. If a star or galaxy is moving very fast toward Earth, the wavelengths of light received from it will be _ ,making the star or galaxy appear _. decreased, redder decreased, bluer decreased, dimmer increased, bluer increased, redder If a star or galaxy is moving very fast away from Earth, the wavelengths of the light received from it will be _, making the star or galaxy appear _. increased, bluer decreased, redder decreased, bluer increased, brighter increased, redder