how to calculate the speed of the light?

Question

QUORAN'S CALCULATION PLEASE

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only QUORAN'S calculation ...
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PLEASE

Answer 1

I am assuming you mean Quran calculation:

It was stated in the Quran (Koran, the book of Islam) that angels travel in one day the same distance that the moon travels in 1000 lunar years, that is, 12000 Lunar Orbits / Earth Day. Outside gravitational fields 12000 Lunar Orbits / Earth Day turned out to be the known speed of light.

This definition is common to all observers: An observer near a black hole sees the speed of light outside gravitational fields a zillion km/s but still equal to 12000 Lunar Orbits / Earth Day

Answer 2

Do you mena from first principles or experimentally. From first principles, go through the derivation of Maxwell's Equations. You can derive an equation for a travelling wave in which the speed comes out to be the value of the speed of light - all from two physical constants, the permittivity of space and the permeability of space.

Answer 3

Using a laser between two points of known distance and then calculating the time of travel.

Answer 4

Dear

The speed of light in vacuum is an important physical constant denoted by the letter c for constant or the Latin word celeritas meaning "swiftness".[1] It is the speed of all electromagnetic radiation, including visible light, in a vacuum. More generally, it is the speed of anything having zero rest mass.


A line showing the speed of light on a scale model of Earth and the Moon, about 1.2 seconds.
In metric units, c is exactly 299,792,459 metres per second (1,079,252,848.8 km/h).[2] The fundamental SI unit of length, the metre, has been defined since October 21, 1983, as the distance light travels in a vacuum in 1/299,792,458 of a second; any increase in the precision of the measurement of the speed of light would refine the definition of the metre, but not alter the numerical value of c. The approximate value of 3×108 m/s is commonly used in rough estimates. In imperial units, the speed of light is about 670,616,629.2 miles per hour or 983,571,056 feet per second, which is about 186,282.397 miles per second, or roughly one foot per nanosecond.

The speed of light when it passes through a transparent or translucent material medium, like glass or air, is slower than its speed in a vacuum. The ratio of c to the observed phase velocity is called the refractive index of the medium. General relativity explains how a gravitational potential can affect the apparent speed of distant light in a vacuum, but locally light in a vacuum always passes an observer at a rate of c.

According to the currently prevailing definition, adopted in 1983, the speed of light is exactly 299,792,458 metres per second (approximately 3×108 metres per second, or about thirty centimetres (one foot) per nanosecond). The value of c defines the permittivity of free space (ε0) in SI units as:


The magnetic constant μ0 is not dependent on c and is defined in SI units as:

.
These constants appear in Maxwell's equations, which describe electromagnetism, and are related by:


Astronomical distances are sometimes measured in light years (the distance that light would travel in one year, roughly 9.46×1012 kilometres or about 5.88×1012 miles). Because light travels at a large but finite speed, it takes time for light to cover large distances. Thus, when we see the light of very distant objects in the universe, we are actually seeing light emitted from them a long time ago: we see them literally as they were in the distant past.

Answer 5

There is no evidence that what you are asking for exists.

The speed of light is a physical phenomenon that is determined by meansurement; it is not calculated.