>> Your prof was correct. Semantic domains, etymology, and all those >> little tidbits of trivia are interesting- but not useful in the final >> analysis because words gain meaning only from context. >[....] >> To isolate a word and assign it meaning is futile. >[....] > >There is more context to the text than the words proximate to >the text.
When looking at brightness specifications of LEDs, the most common specs available are luminous intensity (usually measured in units of candelas or millicandelas) and viewing angle (measured in degrees). The brightness of 1 candela is roughly around the same brightness as a common candle. A millicandela, or mcd, is 1000 times less bright than a candela, hence the prefix milli-. 1000 millicandelas = 1 candela. Since light is not always evenly dispersed, the viewing angle of a light source is very important.
Luminous intensity. The luminous intensity of a light source is the power of light. It is defined in a given direction and is measured in candela, cd.The candela is one of the seven base units of the SI system and specifies the luminous intensity in one specific angle from a light source.uminous intensity. The luminous intensity of a light source is the power of light. It is defined in a given direction and is measured in candela, cd.The candela is one of the seven base units of the SI system and specifies the luminous intensity in one specific angle from a light source.