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 Time stretch due to distance?

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bluestar



Posts : 4
Join date : 2011-08-23

Time stretch due to distance?  Empty
PostSubject: Time stretch due to distance?    Time stretch due to distance?  EmptyTue Aug 23, 2011 4:19 pm

When light from a very distant source gets red-shifted due to distance, does the time that the light represents also get stretched? In other words, lets say a pulsar rotates at 1000 times per second. Would we see a change in that rotation speed simply due to the space expanding? Cool
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TomK

TomK

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Join date : 2011-08-23

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PostSubject: Re: Time stretch due to distance?    Time stretch due to distance?  EmptyTue Aug 23, 2011 4:19 pm

Short answer: yes.

Long answer: ... (I'm sure someone will be along to say more)
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AstroTurk

AstroTurk

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Join date : 2011-08-23
Age : 33

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PostSubject: Re: Time stretch due to distance?    Time stretch due to distance?  EmptyTue Aug 23, 2011 4:21 pm

From whose vantage point? But yes, a distant pulsar would appear to us here on Earth to be pulsing more slowly than an observer, say, in orbit around the pulsar. That's because, from our perspective, the pulsar is (slightly) farther away after each pulse, so the light from each pulse has to travel farther, which takes longer.
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