the refractive index is measured
61Lens (optics) — For other uses, see Lens. A lens. Lenses can be used to focus light. A lens is an optical device with perfect or approximate axial symmetry which tra …
62Clerici solution — is a solution of equal parts of thallium formate (Tl(CHO2)) and thallium malonate (Tl(C3H3O4)) in water. It is a freely flowing, odorless liquid which changes from yellowish to colorless upon decreasing the concentration of the thallium salts. At …
63Digital holographic microscopy — Contents 1 Working principle 2 Advantages 3 Applications 4 …
64Radar — For other uses, see Radar (disambiguation). A long range radar antenna, known as ALTAIR, used to detect and track space objects in conjunction with ABM testing at the Ronald Reagan Test Site on Kwajalein Atoll …
65Optical time-domain reflectometer — Fluke Networks OTDR in use Yokogawa s OTDR …
66Honey — For other uses, see Honey (disambiguation). Jars of honey and honeycomb …
67Measuring instrument — Captain Nemo and Professor Aronnax contemplating measuring instruments in Twenty Thousand Leagues Under the Sea …
68Fused quartz — A sphere manufactured by NASA out of fused quartz for use in a gyroscope in the Gravity Probe B experiment. It is one of the most accurate spheres ever created by humans, differing in shape from a perfect sphere by no more than 40 atoms of… …
69Cauchy's equation — is an empirical relationship between the refractive index n and wavelength of light λ for a particular transparent material. It is named for the mathematician Augustin Louis Cauchy, who defined it in 1836.The most general form of Cauchy s… …
70Ellipse — Elliptical redirects here. For the exercise machine, see Elliptical trainer. This article is about the geometric figure. For other uses, see Ellipse (disambiguation). Not to be confused with ellipsis. An ellipse obtained as the intersection of a… …
