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Technically, the answer is "un-defined" or un-answerable. They define 2 different types of measurement.A "meter" is a measurement of length, while a square meter is a measurement of area.Think of it in terms of the shape of a square that is 1 meter x 1 meter x 1 meter x 1 meter. You can define the perimeter length (which is what you might be asking for), and that = 4 meters (each of the sides of the square added together). The area of the square is 1 square meter, which you get by multiplying 2 sides of the square together, which in this case is 1 meter multiplied by 1 meter = 1 sq/meter.
Light intensity or irradiance
A square 1 meter long and 1 meter wide is 1 square meter. 1 square meter equals 1.19599 square yards 1 square meter equals 10.76391 square feet
Half Square meter is twice as big as half a meter square.
1 yard = .9144 meter, therefore 1 square yard = .83612736 square meter. In other words, 1 square meter = 1.19599005 square yard
The lux is the SI unit of illuminance, and is equal to 1 lumen per square meter.
Light Level or Illuminance, is the total luminous flux incident on a surface, per unit area. The work plane is where the most important tasks in the room or space are performed.Measuring Units Light Level - IlluminanceIllumenance is measured in foot candles (ftcd, fc, fcd) (or lux in the metric SI system). A foot candle is actually one lumen of light density per square foot, one lux is one lumen per square meter. 1 lux = 0.0929 foot candle = 1 lumen /sq meter = 0.0001 phot1 ftcd = 1 lux / 10.7521 lumen/sq ft = 1 foot candle = 1x104 lux = 1 phot
Technically, the answer is "un-defined" or un-answerable. They define 2 different types of measurement.A "meter" is a measurement of length, while a square meter is a measurement of area.Think of it in terms of the shape of a square that is 1 meter x 1 meter x 1 meter x 1 meter. You can define the perimeter length (which is what you might be asking for), and that = 4 meters (each of the sides of the square added together). The area of the square is 1 square meter, which you get by multiplying 2 sides of the square together, which in this case is 1 meter multiplied by 1 meter = 1 sq/meter.
Apparently Lumen's :S
The second.I see the "second" as a measure of time, not light.LUX, Lumen or Candela do ring a bell and something like watt per square meter..Yes the S.I. unit measure of light is a limen (lm) .lumen (lm)The SI derived unit for measuring the luminous flux of light being produced by a light source or received by a surface. The luminous intensity of a light source is measured in candela. One lumen represents the total flux of light emitted, equal to the intensity in candela multiplied by the solid angle in steradians (1/(4pi) of a sphere) into which the light is emitted. Thus the total flux of a one-candela light, if the light is emitted uniformly in all directions, is 4pi lumen.
Light intensity or irradiance
That's not a special kind of light - you can do that with any light. The power per area (e.g., watts per square meter is a measure of INTENSITY.
You cannot
define the linermeter
The square root of meter squared is meter.
A square 1 meter long and 1 meter wide is 1 square meter. 1 square meter equals 1.19599 square yards 1 square meter equals 10.76391 square feet
They don't designate the speed of light, but they do define the meter as1/299,792,458 of the distance that light travels in one second in vacuum.