1. Outline what is meant by the Doppler effect.
(1) Outline what is meant by the Doppler effect.
(2) State what two details about a star's motion relative to the Earth can be found from the following statement: 'Light from the star exhibits a red-shift of 5%'.
(3) Suggest why light from a hand-held lantern does not exhibit blue-shift if the person holding the lantern is walking towards an observer.