Power in Optics
In optics, or radiometry, the term power sometimes refers to radiant flux, the average rate of energy transport by electromagnetic radiation, measured in watts. In other contexts, it refers to optical power, the ability of a lens or other optical device to focus light. It is measured in dioptres (inverse metres), and equals the inverse of the focal length of the optical device.
Read more about this topic: Power (physics)
Famous quotes containing the word power:
“Will power is only the tensile strength of one’s own disposition. One cannot increase it by a single ounce.”
—Cesare Pavese (1908–1950)