the high spectral purity
61Astrophysical maser — An astrophysical maser is a naturally occurring source of stimulated spectral line emission, typically in the microwave portion of the electromagnetic spectrum. This emission may arise in molecular clouds, comets, planetary atmospheres, stellar… …
62Pulsating white dwarf — V777 Herculis star redirects here. For the star, see GD 358. A pulsating white dwarf is a white dwarf star whose luminosity varies due to non radial gravity wave pulsations within itself. Known types of pulsating white dwarfs include DAV, or ZZ… …
63Refractive index — Refraction of light at the interface between two media. In optics the refractive index or index of refraction of a substance or medium is a measure of the speed of light in that medium. It is expressed as a ratio of the speed of light in vacuum… …
64Naine blanche à pulsations — Une naine blanche à pulsations est une étoile naine blanche à la luminosité variable du fait de pulsations d ondes de gravité non radiales dans sa partie interne. Les types connus de naines blanches à pulsations comprennent les étoiles DAV, ou ZZ …
65Shades of green — Main article: Green Green   Spectral coordinates  Wavelength 520–570 nm …
66Ruby — This article is about the mineral. For other uses, see Ruby (disambiguation). Ruby Natural ruby crystals from Winza, Tanzania General Category …
67Circular dichroism — (CD) refers to the differential absorption of left and right circularly polarized light.[1][2] This phenomenon was discovered by Jean Baptiste Biot, Augustin Fresnel, and Aimé Cotton in the first half of the 19th century.[3] It is exhibited in… …
68Mass spectrometry — (MS) is an analytical technique that measures the mass to charge ratio of charged particles.[1] It is used for determining masses of particles, for determining the elemental composition of a sample or molecule, and for elucidating the chemical… …
69Enana blanca — Saltar a navegación, búsqueda Comparación de tamaños entre la enana blanca IK P …
70Rare earth element — Rare earth ore, shown with a United States penny for size comparison These rare …
