You cannot 'measure' light. However, there is the light-year, a measurement of the distance light can travel in one year.
there are many. Lumens, cadlepower, foot candles and candelas. There are probably a few more.
Photon is elementary particle of light and electromagnetic energies
That would depend what you want to measure about the light - its speed, its color, its wavelength, its intensity, its luminosity, etc.
A unit of light is called a photon.
Lumen
Light have no sI unit
micrometer
"light-year"
The distance light travels in one year is called a light-year. To get the number 9,470,000,000,000, the unit used is the kilometer.
Its based on the speed of light.
a unit of measurement
The unit of measurement is the "light year".
A candela is a unit of measurement for light sources and light emissions. Light beams projects different color at different wavelengths, and a candela is used to measure the intensity of the light.
You don't use it, it is a unit of measurement.
You don't use it, it is a unit of measurement.
Nanometres. mX10^-9
light-year
usually lights are measured in lumens
micrometer
"light-year"
Light Year is unit for all astronomic distances
A unit that is commonly used in astronomy is the light-year - the distance light travels in a year.
unit of measurement