Free Republic
Browse · Search
General/Chat
Topics · Post Article

To: LeGrande
“The lag is due to the time it takes for light to travel from the Sun to the Earth combined with the Earth's angular rotation.” [excerpt]
Is the lag present when observed from the North or South poles?
1,204 posted on 02/04/2009 6:06:40 PM PST by Fichori (https://secure.freerepublic.com/donate <= Donate and show Obama how much you love him)
[ Post Reply | Private Reply | To 1203 | View Replies ]


To: Fichori
Is the lag present when observed from the North or South poles?

It always takes apx. 8.3 minutes for the light to get to the Earth from the Sun. An observer on a pole sees the Sun where it was 8.3 minutes ago.

Let's make the question more interesting : ) Let's say that you are standing on a turntable at the North Pole. Lets also say that the turntable is tracking the Suns gravity field (its actual position). Will the pointer on the turntable be pointing at the light that you see or will it be leading or lagging that light by 2.1 degrees?

Here is another question for you. A sextant is pointed at the Sun from our spinning Earth, then the Earths rotation is stopped (we have an inertia less system). Will the Suns apparent motion immediately stop or will it stop in 8.3 minutes?

Or the question in reverse. You are looking at the Sun in the sky. The Sun is turned off. Will you see the Sun traveling across the sky for another 8.3 minutes or will the Sun appear to stop in the sky for 8.3 minutes until it goes dark?

I am also curious about your answer to my question about your lazer ring gyro?

1,205 posted on 02/04/2009 7:37:01 PM PST by LeGrande (I once heard a smart man say that you canÂ’t reason someone out of something that they didnÂ’t reaso)
[ Post Reply | Private Reply | To 1204 | View Replies ]

Free Republic
Browse · Search
General/Chat
Topics · Post Article


FreeRepublic, LLC, PO BOX 9771, FRESNO, CA 93794
FreeRepublic.com is powered by software copyright 2000-2008 John Robinson