An objective specification of the quality of a colour, regardless of its luminance.
Can mean any of radiant intensity, luminous intensity or irradiance.
Time-averaged energy flux (the ratio of average power to the area through which the power "flows"); irradiance.
Synonym of radiance.
The degree of strength.
The quality of being intense.
The severity of an earthquake in terms of its effects on the earth's surface, and buildings. The value depends on the distance from the epicentre, and is not to be confused with the magnitude.