The Speed of Light: Relative to Us?

[Nenad]

How long does it take for each to reach its destination?

$$t = \frac{d}{V}$$

$$t = \frac{d \sqrt{1 - v^{2}/c^{2}}}{0.8c}$$

$$t = \frac{0.8ly \sqrt{1 - (0.8c)^{2}/c^{2}}}{0.8c}$$

$$t = 0.6y$$

How far did each travel?

$$d_o = d\sqrt{1 - v^{2}/c^{2}}$$

$$d_o = 0.8ly \sqrt{1 - (0.8c)^{2}/c^{2}}$$

$$d_o = 0.48ly$$

What is that time multiplied by that distance?

I see no point to multiplying time and distance.

 

[Nenad]

damn, Doc Al keeps beating me to answers, BLAST!

 

[Adam]

I'm just trying to get my head around the maths. I'm crap at maths. I want to see all the bits and pieces.

 

[aekanshchumber]

look, you first of all photon is nothing as you are thinking. you are treating a photon as a particle to explain for which higher dimensions of dimensions of universe are required.

 

[Nenad]

I'm just trying to get my head around the maths. I'm crap at maths. I want to see all the bits and pieces.

you don't understand what I did in my higher post?

 

[JasonRox]

Anyone know the link for the David Hoggs SR Book?

This might help him out.

It sure has shed some light on me.

I'll post it later if I find it.

 

[Chronos]

A journalist once asked Sir Arthur Eddington... I hear that only three people on Earth understand relativity... After repeating the question, Eddington replied, hmm, I am still tying to figure out who the third person is.. a physics joke, but a good one.

 

[Adam]

you don't understand what I did in my higher post?

I never studied maths in high school. I quit school early to join the military. I basically have to play catch-up with everyone else.

 

[Doc Al]

David Hogg's SR Book

Anyone know the link for the David Hoggs SR Book?

http://www.physics.nyu.edu/hogg/sr/sr.pdf

An excellent book! Short, clear, accurate.

 

[Nenad]

A journalist once asked Sir Arthur Eddington... I hear that only three people on Earth understand relativity... After repeating the question, Eddington replied, hmm, I am still tying to figure out who the third person is.. a physics joke, but a good one.

they were actually talking about General Relativity. The joke is irrelivant on a Special relativity thread, which is quite easy to understand.