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skiagraph

(Encyclopedia) skiagraph: see X ray.

Wray, John

(Encyclopedia) Wray, John: see Ray, John.

DK Science: Food Plants

PADDY FIELDS IN CHINAVERSATILE FOOD PLANTLIFE CYCLE OF RICECOMBINE HARVESTERS GATHER WHEATCROP ROTATIONSELECTIVE BREEDINGBIOGRAPHY: NORMAN BORLAUG American, 1914-PESTSFIND OUT MOREFood chains begin…

polarization of light

(Encyclopedia) polarization of light, orientation of the vibration pattern of light waves in a singular plane. Unpolarized light can be converted into a single polarized beam by means of the Nicol…

DK Science & Technology: Lenses

WHAT DOES A LENS DO? WHAT IS THE DIFFERENCE BETWEEN A MICROSCOPE AND A TELESCOPE? CONVEX LENSCONCAVE LENSFIND OUT MOREWhen you look through a magnifying glass, or take a picture with a camera, you…

observatory, orbiting

(Encyclopedia) observatory, orbiting, research satellite designed to study solar radiation, electromagnetic radiation from distant stars, the earth's atmosphere, or the like. Because the atmosphere…

virtual observatory

(Encyclopedia) virtual observatory, a collection of integrated astronomical data archives and software tools that utilize computer networks to create an environment in which research can be conducted…