The Murder of the U.S.A. by Murray Leinster

Author:Murray Leinster [Leinster, Murray]
Language: eng
Format: epub
Published: 0101-01-01T00:00:00+00:00

[*] Johnson detectors and infra-red scanners, both depending on radiations originating in distant objects, and with those radiations governed by the object’s temperature, give indications which vary with the temperature of the object. Therefore they will sort out very cold objects at the temperature of interplanetary space from objects which have been in airless space for a relatively short time and were, moreover, heated in their upward passage through the atmosphere. Radar gives no indication of temperature, but gives excellent readings of velocity.

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