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184. Problem 2.50 (R) We have to find the wavelength shift, if any, in the
Doppler effect for the sodium
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line
(
)
emitted from a source moving in a circle with constant speed 0.1 c
measured by an observer fixed at the centre of the circle. |
Solution: Click For PDF Version As the source is moving in a circle with respect to an
observer at the centre of the circle the line of sight is at
In our problem
Therefore, shift in the wavelength will be
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to
the relative motion. In this case there will be transverse Doppler effect. If a
source moving with velocity v transverse to the direction of observation
emits waves of frequency
the
observed frequency will be
and
. The
wavelength of the sodium
.