Sentences with phrase «distances at higher frequencies»
He hears much better than you do — softer sounds over greater distances at higher frequencies.
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«Optical distance measurement at record - high speed: Microresonator - based optical frequency combs enable highly - precise optical distance ranging at a rate of 100 million measurements per second - publication in Science..»
So the intensity of radiation (at some frequency and polarization) changes over distance, such that, in the direction the intensity is going, it is always approaching the blackbody value (Planck function) for the local temperature; it approaches this quickly if the absorption cross section density is high; if the cross section density is very high and the temperature doesn't vary much over distance, the intensity may be nearly equal to the Planck function for that location; otherwise its value is a weighted average of the Planck function of local temperature extending back over the path in the direction it came from.