langley per minute
Intensityexact by definition
The langley per minute is one thermochemical calorie per square centimetre per minute, exactly 41840/60 or about 697.33 watts per square metre. It is the older unit of solar radiation in meteorology and agronomy, where the solar constant is about 1.95 Ly/min and daily insolation totals are reported in langleys per day. The conversion is exact, the thermochemical calorie being defined as exactly 4.184 joules.
| 1 | 697.33333 |
Where the unit came from
Named for Samuel Pierpont Langley, who built the bolometer in 1878 and used it to measure the solar spectrum from Mount Whitney. His attempt at the solar constant was the first serious one, and the unit stayed in agricultural and climate records long after the field went metric.
One langley per minute in every intensity unit
| 697,333,000 | microwatt per square meter (μW/m²) | |
| 697,333 | milliwatt per square meter (mW/m²) | |
| 69,733.3 | microwatt per square centimeter (μW/cm²) | |
| 697.333 | watt per square meter (W/m²) | |
| 221.054 | BTU per hour square foot (BTU/(h·ft²)) | |
| 69.7333 | milliwatt per square centimeter (mW/cm²) | |
| 1 | langley per minute (Ly/min)this unit | |
| 0.697333 | kilowatt per square meter (kW/m²) | |
| 0.0697333 | watt per square centimeter (W/cm²) | |
| 6.97333e-08 | megawatt per square centimeter (MW/cm²) |
Solvers that use intensity