The speed of light in a vacuum

  • Thread starter francisco
  • Start date
  • #1
18
0
the speed of light in a vacuum....

the speed of light in a vacuum is a true constant of nature, independent of the wavelength of the light or the choice of an (inertial) reference frame. is there any sense, then, in which einstein's second postulate can be viewed as contained within the scope of his first postulate?
 

Answers and Replies

  • #2
727
168
francisco said:
the speed of light in a vacuum is a true constant of nature, independent of the wavelength of the light or the choice of an (inertial) reference frame. is there any sense, then, in which einstein's second postulate can be viewed as contained within the scope of his first postulate?

You have been reading sci.physics.relativity haven't you? This has been discussed regularly there and you know that the light postulate is not needed to formulate the Lorentz transforms.
 
  • #3
1,525
10
Einstein's second postulate actually related only to the independence of the velocity of light on the velocity of the source - not the receiver - the independence of the velocity of the receiver relative to light follows from the first postulate.

Specifically, the second postulate is: "Any ray of light moves in the stationary system of coordinates with the determined velocity c whether the ray be emitted by a stationary or moving body.."
 

Related Threads on The speed of light in a vacuum

  • Last Post
Replies
19
Views
4K
  • Last Post
Replies
12
Views
961
  • Last Post
Replies
11
Views
796
  • Last Post
Replies
2
Views
652
Replies
20
Views
4K
Replies
11
Views
1K
Replies
5
Views
784
Replies
4
Views
816
Replies
8
Views
611
Top