radiación ultravioleta

radiación ultravioleta

The invisible electromagnetic radiation beyond the violet end of the spectrum of visible light, of wavelengths ranging, roughly, from 4000 down to 400 angstroms.

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行业/领域：天文学
类别火星
Company: NASA
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radiación ultravioleta (UV)

灯具照明; 照明产品

Radiant energy in the range of about 100-380 nanometers (nm). For practical applications, the UV band is broken down further as follows: Ozone-producing - 180-220 nm; Bactericidal ...

ultravioleta

天文学; 行星科学

Invisible part of the light spectrum where wavelengths are shorter than the visible spectrum and longer than X rays.

ultravioleta

天气; 一般天气

La radiación electromagnética que tiene una longitud de onda más corta que la luz visible y más largas que los rayos X. A pesar de que sólo representa el 4 al 5 por ciento de la ...

radiación

能源; 核能

Partículas (alfa, beta, neutrones) o rayos (gama) emitidos del núcleo de un átomo radioactivo inestable como resultado de la descomposición radioactiva.

radiación

灯具照明; 照明产品

A general term for the release of energy in a "wave" or "ray" form. All light is radiant energy or radiation, as is heat, UV, microwaves, radio waves, etc.

Marte

天文学; 火星

Mars is the fourth planet from the Sun. Mars' diameter is 6,790 km and takes 687 days to orbit the Sun. Mars is named after the Roman god of war. In Eastern Asian cultures Mars is ...

Fobos

天文学; 火星

The larger and innermost of the planet Mars' two moons. Phobos was discovered by Asaph Hall on August 17, 1877. In Greek mythology, Phobos was the son of Ares (Mars) and Aphrodite ...

solsticio de invierno

天文学; 火星

The position on the ecliptic occupied by the sun about december 22 when it reaches its greatest southerly declination.

rayos X

天文学; 火星

Very short wavelength radiations beyond the ultraviolet in the spectrum, which are about one ten-thousandth as long as the visible violet and are extremely penetrating.

cenit

天文学; 火星

The point of the celestial sphere directly overhead, 90 degrees above the horizon, for any point on earth; it is the point where a plumb line extended upward would intersect the ...

cuadratura

天文学; 火星

Two bodies are in quadrature when their difference in celestial longitude is 90 degrees. This is the position of a superior planet when its elongation is 90 degrees, east or west, ...

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行业/领域：体育类别篮球

pelota muerta

(basketball term) any ball that is not live; occurs after each successful field goal or free-throw attempt, after any official's whistle or if the ...