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From a measurement of the wavelength (or its reciprocal, frequency) of light, we may determine the chemical element that created that emission, as well as the energy needed for it.
We may also determine whether the object is moving towards us or away. Examples would be the apparent recession of the expanding universe; and more homely, your speed as measured by the police radar machine.
If your question concerned the units in which the wavelength of light is usually measured, the nanometre (10-9m). We can see over about 1/2 an octave of frequencies - about 400nm to about 700nm. Beyond this at one end is infrared wavelengths, and at the short wavelength end we have the ultraviolet wavelengths.
What else can I help you with?
Are light-years stars?
No. A light-year is a measurement. A light year is a distance measurement based on how far light travels in a year.
What is the unit for measurement of light?
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.
Can light years be thought of as a measurement of time?
Yes, in the same way the 2011 Colts can be thought of as a great football team, i.e. incorrectly. Light years are a measurement of distance.
Which unit of measurement represents the distance light travels in one year light-year or parsec?
"light-year"
What SI measurement measures the brightness of a light bulb?
lumen
What is the only animal that can see light of wavelengh between 100 and 300 nanometers and also between 1000 and 100000 nanometers?
Goldfish
Are light-years stars?
No. A light-year is a measurement. A light year is a distance measurement based on how far light travels in a year.
What is the difference between cosmic and terrestial radiation?
Basicly the wavelengh
Which unit of measurement uses the distance light travels in one year - 9470000000000km?
The unit of measurement is the "light year".
What does wavelengh have to do with fire?
the wavelength will tell you the temperature chemically and change the colour physically
Why do astronomers use light year to measure time in space?
They don't. Light years are a distance measurement, not a time measurement.
What is measurement of cost?
what is northern light?
What kind of measurement of the speed of light would you consider a direct measurement?
A direct measurement of the speed of light would involve measuring the time it takes for light to travel a known distance, such as using a laser and a precise timing device.
How many years are in a 100 light years?
Years are a measurement of time; light years are a measurement of distance. A light year is the distance light travels in one year (in a vacuum).
What is the measurement of distance in space?
Light Years
What is the SI measurement of light?
There is no "measurement of light". The units used depend on what you want to measure: its speed, frequency, wavelength, energy per photon, etc.
What is a lumen of light?
A lumen of light is a measurement of visible light. It means the brightness of light and can vary depending on the light source.
