Word: spectras
(lookup in dictionary)
(lookup stats)
Dates: all
Sort By: most recent first
(reverse)
...spectrum, from which a quasar's characteristics and even its distance can be determined. Most scientists believe that each of the some 3,000 known quasars, and thus the spectrum of each, is unique. Says Charles Lawrence, a Caltech astronomer and a co-author of the Nature paper: "Quasar spectra are something like fingerprints, and no two are the same...
...Angeles were treated to a strange sight. As a chorus line of cheerleaders kicked and a bevy of multicolored balloons rose in the sky, a huge cloth dropped to reveal a two-story model of a camera. Polaroid was pulling out all the f-stops to introduce the Spectra, a new instant camera that will sell for a steep...
Polaroid hopes that the Spectra will revive its instant-camera sales, which plunged from a record 9.4 million units in 1978 to 3.5 million last year as more and more shutterbugs turned to superior 35-mm cameras. The Cambridge, Mass.-based company says that with the advanced chemistry of Spectra film, the new camera will produce sharper pictures with truer color than did previous models...
Many other aspects of cometary theory have since been refined or expanded. By studying the spectra of light emitted from molecules broken down in the gaseous coma, scientists have estimated that a comet's nucleus consists of two-thirds water, one-fifth dust (particles averaging one-thousandth the width of a pinhead) and the rest a mixture of methane, ammonia, carbon dioxide and trace elements...
Molecular Dynamic Studiews of Forbidden Infra-Red Spectra: W.A. Steele, Boston University Science and Engineering Auditorium...