Physics

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Astronomers find that light emitted by a particular element at one edge of the Sun has a slightly higher frequency than light from that element at the opposite edge. What do these measurements tell us about the Sun’s motion?

  • Physics -

    It indicates the sun rotates, so the side rotating away from us is moving more slowly (relative to us) than the side rotating towards us.

    Of course, a tiny part of the shift is due to our revolving around the sun, but that doesn't count much.

  • Physics -

    thank you, is this related to the doppler effect

  • Physics -

    It is exactly the Doppler effect.

  • Physics -

    Thank you

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