intensity

Exceptionally great concentration, power, or force.

The amount or degree of strength of electricity, light, heat, or sound per unit area or volume.

The strength of a color, especially the degree to which it lacks its complementary color.

The character or state of being intense; the quantity or degree of a quality, action, or effect; degree; specifically, a high degree.

In physics and mech., the amount or degree of energy with which a force operates or a cause acts; effectiveness, as estimated by the result; the magnitude of a force, measured in appropriate units.