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Likurg_2 [28]
3 years ago
10

A particular spectral line from an observed object is measured to be at a wavelength of 400 nm. that same spectral line is found

to have a wavelength of 800 nm when measured at rest in the lab. what is the radial velocity of the observed object?
Physics
1 answer:
Butoxors [25]3 years ago
5 0
To find the radial velocity of the object we are going to apply the regular Doppler formula:
 [measured wavelenght - rest wavelenght/ rest wavelenght] = V/C, where V is the radial velocity and C is the speed of light which is equal to 300,000km/sec.
[400 - 800/800] = V/300,000 = - 150,000.
This means that the object is moving at a velocity of 150,000km/sec toward the observer.
The minus sign infront of the answer indicates that the object is moving towards the observer while a positive value will indicate that the object is moving away from the observer.
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