Reflectivity vs. Reflectance: What's the Difference?

The quality of being reflective.

The ratio of the total amount of radiation, as of light, reflected by a surface to the total amount of radiation incident on the surface.

The ability to reflect.

(physics) The ratio of the flux reflected to that incident on a surface.

(Physics) The ratio of the energy of a wave reflected from a surface to the energy possessed by the wave striking the surface.

The fraction of radiant energy that is reflected from a surface

(physics) The property or quality of being reflective.

The fraction of radiant energy that is reflected from a surface

The ability to reflect beams or rays