A star emits light with wavelength 120 nm.An observer on earth measures the wavelength of the light received from the star to be 600 nm. calculate the speed with which the star is moving.
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Wavelength of star speed of light
---------------------------- = ---------------------
Wavelength of light. Speed of star
Therefore, speed of star =
3*10^8 × 120
--------------------- = 6× 10^7 m/s
600
---------------------------- = ---------------------
Wavelength of light. Speed of star
Therefore, speed of star =
3*10^8 × 120
--------------------- = 6× 10^7 m/s
600
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