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Author Topic:   Speed of Light
Hoof Hearted
Junior Member (Idle past 4366 days)
Posts: 24
From: Chorley, Lancs, UK
Joined: 03-20-2007


(1)
Message 1 of 268 (471925)
06-19-2008 9:25 AM


I'm sure there must be a simple explanation to this...

I'm not an expert, but one of the concepts I understand is that the speed of light is constant and is independant of the motion of the observer. Why is it then, that red-shift occurs when observing distant galaxies which are moving away from us?

Another concept I am given to understand is that the speed of light CAN vary according to the density of the medium in which it is travelling. My own simplistic logic therefore, would conclude that red-shift is the result of light travelling massive distances through sparsly occupied(but not empty) space.

Can someone put me on the right track with my thinking please?

Ian


Replies to this message:
 Message 3 by New Cat's Eye, posted 06-19-2008 9:50 AM Hoof Hearted has replied
 Message 7 by Libmr2bs, posted 06-20-2008 10:02 PM Hoof Hearted has taken no action
 Message 259 by justatruthseeker, posted 11-22-2014 10:17 AM Hoof Hearted has taken no action
 Message 267 by justatruthseeker, posted 07-24-2015 2:19 PM Hoof Hearted has taken no action

  
Hoof Hearted
Junior Member (Idle past 4366 days)
Posts: 24
From: Chorley, Lancs, UK
Joined: 03-20-2007


Message 4 of 268 (471931)
06-19-2008 10:17 AM
Reply to: Message 3 by New Cat's Eye
06-19-2008 9:50 AM


I had to read your reply 3 times before I grasped it. But yes, that make perfect sense now. Thank you for your help.

This message is a reply to:
 Message 3 by New Cat's Eye, posted 06-19-2008 9:50 AM New Cat's Eye has taken no action

Replies to this message:
 Message 5 by Jester4kicks, posted 06-19-2008 10:34 AM Hoof Hearted has taken no action
 Message 6 by Percy, posted 06-19-2008 10:39 AM Hoof Hearted has taken no action

  
Hoof Hearted
Junior Member (Idle past 4366 days)
Posts: 24
From: Chorley, Lancs, UK
Joined: 03-20-2007


Message 142 of 268 (539247)
12-14-2009 11:51 AM
Reply to: Message 141 by Viv Pope
12-14-2009 11:39 AM


Re: Spin and Perception
Can someone tell me please if there is a way to get unsubscribed from this thread? My original question has long since been answered and I have no wish to read the comments that are now being posted.

Ian


This message is a reply to:
 Message 141 by Viv Pope, posted 12-14-2009 11:39 AM Viv Pope has taken no action

Replies to this message:
 Message 143 by Admin, posted 12-14-2009 11:58 AM Hoof Hearted has replied
 Message 144 by Iblis, posted 12-14-2009 12:01 PM Hoof Hearted has taken no action

  
Hoof Hearted
Junior Member (Idle past 4366 days)
Posts: 24
From: Chorley, Lancs, UK
Joined: 03-20-2007


Message 145 of 268 (539250)
12-14-2009 12:05 PM
Reply to: Message 143 by Admin
12-14-2009 11:58 AM


Re: Spin and Perception
A few days ago I unchecked the option in my profile for receiving email notifications. I just edited my 'Message1' The option in there was also unchecked. But I am still receiving notifications. So if there is a way to 'Shut off' the notifications, they I would be grateful for this.

Ian


This message is a reply to:
 Message 143 by Admin, posted 12-14-2009 11:58 AM Admin has seen this message

  
Hoof Hearted
Junior Member (Idle past 4366 days)
Posts: 24
From: Chorley, Lancs, UK
Joined: 03-20-2007


Message 153 of 268 (539270)
12-14-2009 2:45 PM
Reply to: Message 152 by cavediver
12-14-2009 2:35 PM


Re: Spin and Perception
I'm still getting my mailbox spammed with notifications that I would prefer not to receive. Can an Admin fix this for me please?

This message is a reply to:
 Message 152 by cavediver, posted 12-14-2009 2:35 PM cavediver has taken no action

Replies to this message:
 Message 154 by Iblis, posted 12-14-2009 2:50 PM Hoof Hearted has taken no action
 Message 162 by AdminModulous, posted 12-14-2009 7:23 PM Hoof Hearted has taken no action

  
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