## watt per steradian

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! Candela/square meter: Lumen/square meter/steradian: Note: Fill in one box to get results in the other box by clicking "Calculate" button. Because "l" can easily be confused with the numeral "1," the symbol "L" is recommended for United States use. 2 In many countries, this unit is called "tonne.". From this, it follows that at a measuring distance of 1 metre, the values for candela (lumen per steradian) and lux (lumen per m 2) are the same. Candela (cd), unit of luminous intensity in the International System of Units (SI), defined as the luminous intensity in a given direction of a source that emits monochromatic radiation of frequency 540 × 1012 hertz and has a radiant intensity in that same direction of 1683 watt per steradian (unit The radiation intensity in a certain direction, in watts per steradian, is given by: For a certain direction, the radiation intensity will be maximal and equals: Radiated Power The total power radiated by the antenna, in Watts, is represented by: Effective Angle cm/steradian (at 555 nm) conversion table and conversion steps are also listed. 1 Both L and l are internationally accepted symbols for liter. One steradian on a sphere with a radius of one metre gives a surface of one m 2 (see the section on candela). The scientific definition is “The candela is the luminous intensity, in a given direction, of a source that emits monochromatic radiation of frequency 540×10 hertz and that has a radiant intensity in that direction of 1/683 watt per steradian.” I like my simple analogy better!! cm/steradian (at 555 nm) conversion or vice versa. Instant free online tool for candela/square meter to watt/sq. Watt per Meter² per Steradian per Micrometer. cm/steradian (at 555 nm) to other luminance units or learn more about luminance conversions. 3 The values of these units expressed in terms of SI units must be obtained by experiment, and are therefore not known exactly. Candela/square meter ↔ Lumen/square meter/steradian Conversion in Batch. The candela is the luminous intensity, in a given direction. It is the luminous power per unit solid angle emitted by a point light source in a particular direction. 1 cd/m2 = 1 lumen/square meter/steradian; 1 lumen/square meter/steradian = 1 cd/m2. Also, explore tools to convert candela/square meter or watt/sq. Nearly all of the imagery available through the Planet API is available in a radiometrically calibrated format with unit spectral radiance.. candela (cd): The candela is the luminous intensity, in a given direction, of a source that emits monochromatic radiation of frequency 540 THz hertz (555 nm) and that has a radiant intensity in that direction of 1/683 watt per steradian. If the source has luminous intensity of one candela in each direction, a type of normalized "candle" ("candela" is a counterpart of one watt per steradian, but with the color/frequency-dependent weights corresponding to the human vision), then it emits luminous flux one lumen in one steradian. Or to be more accurate, it is the luminous intensity, in a given direction, of a source that emits monochromatic radiation of frequency 540×1012 hertz and that has a radiant intensity in that direction of 1/683 watt per steradian. of a source that emits monochromatic radiation of frequency 540 x 1012 hertz and that has a radiant intensity in that direction of 1/683 watt per steradian. The candela/square meter to watt/sq. source The International System of …