# The Naked Scientists Forum

### Author Topic: How big Doppler I will see/register ?  (Read 791 times)

#### marzosia2

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##### How big Doppler I will see/register ?
« on: 23/03/2016 04:28:48 »
it is not homework !

I showed all datas Earth's rotation 360/24 degrees
plase evaluate Doppler  X axis and later Y axis
thank You for help

#### Colin2B

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##### Re: How big Doppler I will see/register ?
« Reply #1 on: 23/03/2016 09:42:33 »
If you are just considering Doppler shift you don't need the radius, just the speed difference between source and detector. You can find the formulae here http://hyperphysics.phy-astr.gsu.edu/hbase/relativ/reldop2.html.
Gravitational shift will be small by comparison, I suggest you ignore it as you are unlikely to be able to detect it.

#### marzosia2

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• Posts: 93
##### Re: How big Doppler I will see/register ?
« Reply #2 on: 23/03/2016 14:52:41 »
What will be if Earth will not moving ( not making rotation 360°/24h ) I will see doopler ?
Earth's motion is reason that I see doppler ?

star 1>>>

Earth  is not movin or moving ?

^
^
star2
« Last Edit: 23/03/2016 14:55:13 by marzosia2 »

#### Colin2B

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##### Re: How big Doppler I will see/register ?
« Reply #3 on: 23/03/2016 15:14:46 »
What will be if Earth will not moving ( not making rotation 360°/24h ) I will see doopler ?
Earth's motion is reason that I see doppler ?
As I said, it depends on the relative motion. As long as the 2 are moving relative to one another you will see a doppler shift.

#### marzosia2

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##### Re: How big Doppler I will see/register ?
« Reply #4 on: 23/03/2016 17:19:28 »
Person inside BOX is making rotation   or not ?
Box is  moving  = he see doppler inside box   - instrumenents are inside box ( true f/alse)
Box is  not  moving  = he not  see doppler inside box   - instrumenents are inside box ( true f/alse)

EXIST STATIONARY COORDINATION SYSTEM ? ( this box ? good example ? )

« Last Edit: 23/03/2016 17:22:59 by marzosia2 »

#### The Naked Scientists Forum

##### Re: How big Doppler I will see/register ?
« Reply #4 on: 23/03/2016 17:19:28 »