Doppler effect

• the Doppler effect is the shift in frequency of a wave produced by a moving object with respect to the observer
• The doppler effect applies for both objects moving away and towards an observer
• Fo: frequency observed

  Fs: frequency of source

  V: velocity of wave

  Vs: velocity of source

  
• the + is used when the object is moving away from the observer
• when the object is moving towards the observer the - is used
• Redshift is the shift in wavelengths of light as observed from distant galaxies from earth
• redshift indicates that these galaxies are moving away from earth
• the Doppler effect cannot be used to calculate redshift because galaxies are moving away at such high speeds that revivalistic effects need to be considered
• z = v/c

  v = velocity of object

  c = speed of light