The New Encyclopædia BritannicaEncyclopædia Britannica, 1983 - Encyclopedias and dictionaries |
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Page 689
... possible to measure contaminants in the atmosphere at a considerable distance by Raman scattering of light from a laser beam . Laser beams can be used for communications . Because the light frequency is so high ( around 5 × 1011 hertz ...
... possible to measure contaminants in the atmosphere at a considerable distance by Raman scattering of light from a laser beam . Laser beams can be used for communications . Because the light frequency is so high ( around 5 × 1011 hertz ...
Page 907
... possible to determine that this radio " brightness tem- perature " of the earth had been steadily increasing with time over the last several decades . Finally , it would be possible to analyze the frequency and time variation of these ...
... possible to determine that this radio " brightness tem- perature " of the earth had been steadily increasing with time over the last several decades . Finally , it would be possible to analyze the frequency and time variation of these ...
Page 912
... possible life - span . It should be observed that this conclusion relates to the inheritance of longevity -the observed expression of the span of life - and not to the span of life itself . The actual length of life itself is shorter ...
... possible life - span . It should be observed that this conclusion relates to the inheritance of longevity -the observed expression of the span of life - and not to the span of life itself . The actual length of life itself is shorter ...
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