Is the Speed of Light Really 3000 km/s?

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Discussion Overview

The discussion revolves around the speed of light, specifically questioning whether it is accurately stated as 3000 km/s. Participants explore the correct value of the speed of light and its implications in different media.

Discussion Character

  • Technical explanation, Debate/contested

Main Points Raised

  • One participant asserts that the speed of light is 3000 km/s and seeks confirmation or correction.
  • Another participant provides the precise value of the speed of light as 299,792,458 m/s, or 299,792.458 km/s.
  • A different participant notes that the initial claim is incorrect, indicating that the speed of light is off by a factor of 100 and emphasizes that this value applies in a vacuum, with slower speeds in other media.
  • Some participants express uncertainty about the initial claim and seek clarification.

Areas of Agreement / Disagreement

Participants generally disagree on the initial claim regarding the speed of light, with multiple competing views presented about its correct value and conditions under which it may vary.

Contextual Notes

The discussion highlights the importance of precision in scientific measurements and the distinction between the speed of light in a vacuum versus in other media, but does not resolve the initial misunderstanding.

Rabinow23
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Problem Statement: I know that speed of light is 3000km per second
Relevant Equations: Is it true?

Can someone correct me if I 'm wrong,just interested thank-you
 
Science news on Phys.org
Can someone correct me if I 'm wrong,just interested thank-you
 
Well, it's 299 792 458##\text{ms}^{-1}##, or, equivalently 299 792,458##\text{kms}^{-1}##.
 
Rabinow23 said:
Problem Statement: I know that speed of light is 3000km per second
Relevant Equations: Is it true?

Can someone correct me if I 'm wrong,just interested thank-you
You dropped a couple of zeroes. And this is the speed in a vacuum; it is slower in other media.
 
You are off by a factor of 100.
It is 299,792 Km/s
 

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