In vacuum it is 299792458 metres/second. It is used for light to get from one location to another.
None. The speed of light is usually assumed to be constant. The symbol used to represent the speed of light is "C", as in E=MC2. Then why is it called a variable speed?
The letter "c" is used to represent the speed of light in a vacuum in physics equations.
The equation used to determine the speed of light in a given material is v = c / n, where v is the speed of light in the material, c is the speed of light in a vacuum, and n is the refractive index of the material.
No.
Pretty close ... that figure is about 99.85% the speed of light. (You used 186,000 miles per second. We used 186,282 .)
No, a megaphone is a device used to amplify sound, particularly human speech. It does not measure light or speed.
lightyear.
Is what the speed of light or light speed.ANSWER300,000 km/s
The speed of light, ca. 300,000,000 meters per second.
It doesn't work that way. The light-year is not used to measure the speed of light. It works the other way round: First, the speed of light is determined through other methods, then the distance called a light-year is calculated based on that measurements.
Light travels at approximately 186,000 miles per SECOND. That is fast. So the expression "faster than the speed of light" is used to describe someone or something that is really fast (but it's not actually faster than speed of light)
Light waves - electromagnetic waves that can travel through a vacuum at the speed of light. Radio waves - electromagnetic waves used for communication that travel at the speed of light in a vacuum. X-rays - a high-energy form of electromagnetic radiation that can travel at the speed of light. Microwaves - electromagnetic waves commonly used in technology and cooking that can travel at the speed of light.