reflection optical density
21Differential interference contrast microscopy — Micrasterias furcata imaged in transmitted DIC microscopy. Differential interference contrast microscopy (DIC), also known as Nomarski Interference Contrast (NIC) or Nomarski microscopy, is an optical microscopy illumination technique used to… …
22Poly(methyl methacrylate) — This article is about the transparent plastic sometimes called acrylic glass. For the glass/plastic laminate often called safety glass , see laminated glass. Poly(methyl methacrylate) …
23Monochromator — in a x ray beamline at the Advanced Photon Source, Argonne National Laboratory. A monochromator is an optical device that transmits a mechanically selectable narrow band of wavelengths of light or other radiation chosen from a wider range of… …
24Absorption (electromagnetic radiation) — An overview of electromagnetic radiation absorption. This example discusses the general principle using visible light as specific example. A white beam source emitting light of multiple wavelengths is focused on a sample (the complementary color… …
25Phase contrast microscopy — Phase contrast image of a cheek epithelial cell Phase contrast microscopy is an optical microscopy illumination technique of great importance to biologists in which small (invisible to the human eye) phase shifts in the light passing through a… …
26natural philosophy — noun the science of matter and energy and their interactions his favorite subject was physics • Syn: ↑physics • Derivationally related forms: ↑physical (for: ↑physics), ↑physicist ( …
27Eye color — is a polygenic trait and is determined by the amount and type of pigments in the eye s iris.Wielgus AR, Sarna T. Melanin in human irides of different color and age of donors. Pigment Cell Res. 2005 Dec; 18(6):454 64. PMID 16280011.] Prota G, Hu… …
28Densitometer — Not to be confused with hydrometer which measures mass density of liquids. Heiland Densitometer TRDZ 1 A densitometer is a device that measures the degree of darkness (the optical density) of a photographic or semitransparent material or of a… …
29densitometer — i. An instrument for measuring the density or specific gravity of fuel. Also called a densimeter. ii. An instrument for measuring the optical density (photographic transmission, photographic reflection, visual transmission, etc.) of a material,… …
30Penetration depth — is a measure of how deep light or any electromagnetic radiation can penetrate into a material. It is defined as the depth at which the intensity of the radiation inside the material falls to 1/e (about 37%) of its original value at (or more… …
