The sky in the East was soft with that luminous intensity, as of a melted sapphire, that comes just before the dawn.
But the luminous intensity of the candle was taken only in the horizontal direction.
The luminous intensity of the oxyhydrogen lime-light as used in practice was generally from 200 to 400 candle-power.
Their luminous intensity and illuminating value became units just as the foot was arbitrarily adopted as a unit of length.
The luminous intensity of the early beacon-fires and oil-lamps was equivalent to a few candles.
For example, consider a small source of light possessing a luminous intensity of one candle in all directions.
Rumford and also Fresnel devised multiple-wick burners, thus increasing the luminous intensity.
The luminous intensity of the streams is, of course, considerably increased when they are focused upon a small surface.
The luminous intensity of a light-source or of the beam of light is directly responsible for the range.
|luminous intensity |
The luminous flux per unit solid angle (per steradian), as measured in a given direction relative to a light source. Its unit is the candela. See also luminance.