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The speed of anything is
(the distance from point-1 to point-2) / (the time it takes that thing to travel from point-1 to point-2)
Consequently, we may write, without fear of confrontation or contradiction,
that the speed of light is
(the distance from point-1 to point-2) / (the time it takes light to travel from point-1 to point-2)
Moreover, after literally centuries of observation and experimentation, by giants
upon whose shoulders we now stand, we are able to write that speed. If there
is no material substance between point-1 and point-2, then the speed is
299,792,458 meters (186,282 miles) per second.
If there IS material substance in that space then the speed is somewhat less,
and varies depending on the substance.
It is never more.
Wiki User
∙ 12y ago
Wiki User
∙ 13y ago'c' stands for celerity and is the common letter used in formulae for the speed of light. It moves in a vacuum, at 300 000 000 metres per second, (300 000 kilometres per second).
A parsec and a light year are other units concerning Distance, and are commonly used in astronomy, but are distances, not speed.
Wiki User
∙ 9y agoThe speed of light is 299,792,458 metres per second. That is its speed in SI units. In the antiquated Imperial units, it is approx 186,200 miles per second or 983,570,000 feet per second.
Wiki User
∙ 14y agoThe units of speed are distance/time. The value of the speed of light in meters per second is approximately 299,792,458 m/s.
Wiki User
∙ 9y agoIn relativistic units the speed of light is 1 exactly.
1 meter/meter of light travel time.
The units cancel.
Wiki User
∙ 9y ago299,792,458 meters per second in vacuum.
Wiki User
∙ 10y ago' c '
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What is A unit of measure that people agree to use?
is meant by measurement in che mistry
What are the si units for a wave speed?
meters per second
What are two units of measure for speed?
In order to measure speed, a unit for distance and a unit for time must be used. Common units with which speed is expressed are meters per second (m/s), miles per hour (mph), and kilometers per hour (km/h).
What is unit for speed if the time is measured in hours and the distance is measured in miles?
You can use ANY unit of speed - but the logical unit of speed in this case would be the one you obtain by dividing the specific unit of length by the specific unit of time, so in this case, miles per hour.
Voltage is measured in what unit?
This unit is called volts.
What is the si standard unit for measurement or lengths?
Its based on the speed of light.
What is metric unit and English standard unit for speed?
The SI derived unit for speed is meter per second, m/s. The English standard unit for speed is feet per second, ft/s.
How many g's is the speed of light?
speed of light is constant velocity and does not accelerate so there is no g force
what is the standard unit of light intensity?
lux
How is the unit lightyear measured?
It's calculated, not measured. It's the speed of light ... 299,792,458 meters per second ... multiplied by the number of seconds in a standard year.
How does these two quantities determine the speed of light?
The distance in meters covered by light in one second is considered to determine the speed of light. Speed of light is 3*108m/s. The unit of speed of light is meters per second.
What is the speed of light in hurtz?
Hz (hertz) is a unit of frequency, not of speed.
Which mectric unit would be used for the speed of light?
lightyear.
What is the unit that astronomers most often use to express the wavelength of light?
Speed of light
What is measure w?
It stands for standard Weight, the unit for light intensity.
Is light years per century a unit of speed?
While it is truly an unconventional (and not very useful) unit, yes it is. Speed (and velocity) are shown as a ratio of elapsed distance to time. Therefore, since a light-year is a measure of distance and a century is a unit of time, this is a unit of speed (or it could be used to measure velocity).
How was the length of the standard meter redifined in 1983?
standard was changed to be associated with the constant speed of light
