1. (i) Le a galaxy A has an absorption line found at wavelength 550nm (green) and for another stationary galaxy it is shifted to 450 nm (blue) (a "blue-shift") for galaxy A. • How fast and in what direction galaxy A be moving. • Find the speed and direction if galaxy B is moving and it shows the same line shifted to 700nm (red) (a"red shift")?
1. (i) Le a galaxy A has an absorption line found at wavelength 550nm (green) and for another stationary galaxy it is shifted to 450 nm (blue) (a "blue-shift") for galaxy A. • How fast and in what direction galaxy A be moving. • Find the speed and direction if galaxy B is moving and it shows the same line shifted to 700nm (red) (a"red shift")?
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Transcribed Image Text:1. (i) Le a galaxy A has an absorption line found at wavelength 550nm (green) and for another
stationary galaxy it is shifted to 450 nm (blue) (a "blue-shift") for galaxy A.
• How fast and in what direction galaxy A be moving.
• Find the speed and direction if galaxy B is moving and it shows the same line shifted to
700nm (red) (a"red shift")?
(ii) The longest wavelength of light emitted by hydrogen in the Balmer series is 2, = 725
nm. In light from a distant galaxy, this wavelength is measured to be 2, = 1358 nm. Find
the speed at which the distant galaxy is receding from the earth.
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