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risingabove
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Homework Statement
The Sun rotates with a period of 24.7 days and has a radius of 7.00 x 108 m. For a terrestrial observer, Calculate the resultant Doppler shift of light of wavelength 500 nm which is emitted from the solar equator at :
i)each side of the disc,
ii)the center of the solar disc
The speed of light, c = 3.00 x 108 m/s
Homework Equations
wavelength shift Δλ = v/c λ
v : speed of of the source
c: speed of light
λ : wavelength of source
speed = distance/ time
24.7 days = 2134080 s
500 nm = 5.0 x 10-7 m
Circumference of a circle = 2∏r = 4.4 x 109 m
The Attempt at a Solution
i) I first found the speed of the source, v
speed = 4.4 x 109 m / 2134080 s
= 2060.9 m/s
using the equation for wavelength shift, plug in values
Δλ = (2060.9 / 3.00 x 108 m/s ) 5.0 x 10-7 m
= 3.43 x 10-12 m
= 0.00343 nm
ii) i assumed that λ = 0
therefore Δλ = (328 / 3.00 x 108 m/s ) 0
= 0 m
.. not sure if my workings are correct ...thanks for any help
Homework Statement
Homework Equations
The Attempt at a Solution
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