Interferometer and Density

noun

• Any measuring instrument that uses interference patterns to make accurate measurements of waves. .

(n.) An instrument for measuring small movements, distances or displacements by means of the interference of two beams of light; -- called also refractometer.

• (n.) Depth of shade.
• (n.) The quality of being dense, close or thick; compactness; -- opposed to rarity.
• (n.) The ratio of mass or quantity of matter, to bulk or volume, especially as compared with the mass and volume of a portion of some substance used as a standard.

noun

• The amount per unit size.
  • synonyms: denseness
• The spatial property of being crowded together.
  • synonyms: concentration, denseness, tightness, compactness

density is a measure of the intensity of land use, designating the number of residential or commercial structures built on a designated area of land, or the number of persons to live and/or work on the property. Density is usually regulated by local government.