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Doppler shift for the light of wavelength 6000 Å emitted from the sun is 0.04 Å. If radius of the sun is 7 × 108 m then time period of rotation of the sun will be |
30 days 365 days 24 hours 25 days. |
25 days. |
$ \text{ doppler shift } d\lambda = \frac{v}{c} \lambda = \frac{2\pi R}{T} \frac{\lambda}{c}$ $ T = \frac{2\pi R \lambda}{d\lambda c} = 25days$
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