Most of the galaxies in the universe are observed to be movingaway from Earth. S

Question

Most of the galaxies in the universe are observed to be movingaway from Earth. Suppose a particular galaxy emits orange lightwith a frequency of 5.00x1014 Hz. If the galaxy is receding from Earth with aspeed of 3725 km/s , what is the frequency of the light whenit reaches Earth? f1 =___________ fHz Most of the galaxies in the universe are observed to be movingaway from Earth. Suppose a particular galaxy emits orange lightwith a frequency of 5.00x1014 Hz. If the galaxy is receding from Earth with aspeed of 3725 km/s , what is the frequency of the light whenit reaches Earth? f1 =___________ fHz If the galaxy is receding from Earth with aspeed of 3725 km/s , what is the frequency of the light whenit reaches Earth? f1 =___________ fHz

Explanation / Answer

We know that              f ' = f ( 1 - v/c)                   = 5.0 x 1014 ( 1 - 3.725x 106 / 3x108)                   = 4.937 x 1014 Hz

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