The doppler effect applies to light waves as well as sound waves. Astronomers use this to measure the motion of stars and galaxies. In 1929, edwin hubble discovered that light from distant galaxies was shifted away from the blue end of the spectrum and toward the red end of the spectrum. Red light or red shifted was shifted away from the blue end of the spectrum and towards the red end of the spectrum. Red light has a longer wavelength and lower frequency than blue light. What could hubble conclude about these galaxies?.

Answer

Hubble could conclude that these galaxies were moving away from the observer as the light they emitted was stretched to longer wavelengths.

Q:What is the Doppler effect? A: The Doppler effect describes the change in frequency or wavelength of a wave in relation to an observer who is moving relative to the wave source.
Q:What did Edwin Hubble discover about light from distant galaxies? A: Edwin Hubble discovered that light from distant galaxies was shifted away from the blue end of the spectrum and toward the red end of the spectrum.
Q:What does redshift mean? A: Redshift refers to when light is shifted away from the blue end of the spectrum and towards the red end of the spectrum because its source is moving away from the observer.
Q:What can Hubble conclude about these galaxies based on their redshift? A:Hubble could conclude that these galaxies were moving away from the observer as the light they emitted was stretched to longer wavelengths.