fluctuations nor malfunctions caused by reflection in the room or radio waves entering into the room by shielding or absorbing two or more of radio waves exclusively used for communications and bidirectionally transmitting the remaining radio waves and which does not become a source of radio ...
1.The frequency of the waves transmitted by a specific radio station. 2.A frequency within the range at which radio waves are transmitted, conventionally from 3 hertz to 300 megahertz, immediately below the range of microwave frequencies in the electromagnetic spectrum. ...
Radio waves:Radio waves are electromagnetic waves whose wavelength is more than the infrared rays. Therefore, the frequency of the radio waves is less than that of the infra-red rays. Wave Travel:The wavelength of a wave, λ (m), is the distance the w...
which determines the directivity pattern of the antenna. For example, radio-wave interference from two dipolesD1andD2, which are separated by a distance equal to several wavelengths and are fed by currents of identical amplitude, phase, and frequency, gives rise to the multilobe directivity patter...
If the charge’s frequency of oscillation isf, then it produces an electromagnetic wave with frequencyf. The wavelength λ of this wave is given by λ =c/fwherecis the speed of light. Electromagnetic waves transport energy through space. This energy can be delivered to charged particles a lar...
The Use of Radio Stars to Study Irregular Refraction of Radio Waves in the Ionosphere The observations and the theory of radio star scintillation are reviewed, and the following conclusions are reached. 1) The frequency variation of amplitud... HG Booker - 《Proceedings of the Ire》 被引量: ...
As reported in a communication entitled “The Relation of 11-Metre Solar System Phenomena to Solar Disturbances” (see Nature, 179, 371; 1957), it appears very probable that the Moon echoes I reported previously (Nature, 178, 159; 1956) did not take plac
lotSYNregularityBusinesses come and gowith alarming frequency.3[countable, uncountable]technicalthe number ofradiowaves, sound waves etc thatpassany point per secondThis station broadcasts on three different frequencies.high/low frequencyDolphins produce a high frequency sound.thefrequency rangeof the ...
radio frequency- an electromagnetic wave frequency between audio and infrared infrared,infrared frequency- the infrared region of the electromagnetic spectrum; electromagnetic wave frequencies below the visible range; "they could sense radiation in the infrared" ...
Similar to the frequency of radio or sound waves, spatial frequencies describe a two-dimensional image in terms of the rate at which it alternates between two values – in the case of type, black and white. Each alteration from white to black to white is referred to as a cycle. While ...