# Speed of Light(c)

My mind keeps boggling around this question is speed of light really a constant or not?

4 years, 7 months ago

MarkdownAppears as
*italics* or _italics_ italics
**bold** or __bold__ bold
- bulleted- list
• bulleted
• list
1. numbered2. list
1. numbered
2. list
Note: you must add a full line of space before and after lists for them to show up correctly
paragraph 1paragraph 2

paragraph 1

paragraph 2

[example link](https://brilliant.org)example link
> This is a quote
This is a quote
    # I indented these lines
# 4 spaces, and now they show
# up as a code block.

print "hello world"
# I indented these lines
# 4 spaces, and now they show
# up as a code block.

print "hello world"
MathAppears as
Remember to wrap math in $$...$$ or $...$ to ensure proper formatting.
2 \times 3 $$2 \times 3$$
2^{34} $$2^{34}$$
a_{i-1} $$a_{i-1}$$
\frac{2}{3} $$\frac{2}{3}$$
\sqrt{2} $$\sqrt{2}$$
\sum_{i=1}^3 $$\sum_{i=1}^3$$
\sin \theta $$\sin \theta$$
\boxed{123} $$\boxed{123}$$

Sort by:

i've read many books on relativity but i didin't find any satisfactory answers, here "satisfactory" means mathematical proof!i've read dover books on relativity and einstein's original abstract

- 4 years, 7 months ago

the speed of light is constant, although light's speed varies depending on where it is. e.g. Light travels at the speed of light in a vacuum but if it travels through glass, it slows down as much as one-third of its usual speed. The speed of light is about 2 996 000 m/s but light's speed depends on where it is. try not to be confused. (Think of speed of light instead as the speed of radio)

- 4 years, 7 months ago

Please do give a proof of physical although mathematical is prefered!

- 4 years, 7 months ago