It is a measure of light energy that hits one square meter in one second
2007-09-22 14:55:42 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Astronomy & Space
Well the question says ______ is a measure or the light energy that hits one square meter in one second. it is for astronomy, but there is only one blank (single word answer)
2007-09-22 15:08:58 · update #1
Radiative flux
changing my answer: Irradiance
(has the same units as previous answer, W/m^2 = J/m^2/s)
2007-09-22 15:08:43 · answer #1 · answered by Jonathan S 2 · 0⤊ 1⤋
Lux radiometric measurement
S.I. unit of illuminance equal to 1 lumen per square meter.
Your basic answer is lumen.
The lumen (symbol: lm) is the SI unit of luminous flux, a measure of the perceived power of light. Luminous flux differs from radiant flux, the measure of the total power of light emitted, in that luminous flux is adjusted to reflect the varying sensitivity of the human eye to different wavelengths of light.
2007-09-22 16:22:57 · answer #2 · answered by Anonymous · 1⤊ 1⤋
Luminance
2007-09-22 15:15:33 · answer #3 · answered by Tom K 6 · 0⤊ 1⤋
It sounds like you are asking about the Solar constant, which is the amount of energy in sunlight at Earth.
2007-09-22 15:04:15 · answer #4 · answered by campbelp2002 7 · 0⤊ 1⤋
ml or L
2007-09-22 15:03:56 · answer #5 · answered by Crazy and Lovin It 4 · 0⤊ 1⤋