Waves— The frequency gives us the number of waves that pass through a point at a selected time. Check here how to find sound frequency. Light waves— The visible spectrum color depends on the frequency of the wave, e.g., 400 THz (4 × 1014 Hz) is red light, and 800 THz (8 ×...
IN the course of a research on the heating effects of radiation of wave-lengths 10 to 200 metres, it was found that for a given wave-length there is a maximum heating effect produced in a medium the specific conductivity and dielectric constant of which are connected with the frequency by ...
The differences are shown only roughly in the t domain (left-hand traces) and are hardly visible in the f domain (bottom traces), but appear clearly in the (t,f) representation, therefore allowing precise measurements of actual frequencies and their epochs (the times at which they appear)....
Difference-frequency mixing is generally used to produce coherent radiation at longer wavelengths than either of the pump wavelengths. It is used most often to produce tunable radiation in the infrared from pump radiation in the visible or near infrared, although it can also be used to generate ...
This Invention relates to new and useful improvements in the production of frequencymodulated waves. The object of the invention is to produce large frequency swings and to operate at relatively high power levels. In accordance with the invention a capacity is incorporated as part of the...收藏...
Frequency, the number of waves that pass a fixed point in unit time; also, the number of cycles undergone during one unit of time by a body in periodic motion. A body in periodic motion is said to have undergone one cycle after passing through a series o
Radio waves in the 300 kHz frequency range are significantly absorbed by the D-layer of the ionosphere during the daytime. Therefore, the sky-wave interference effect is negligible, since its field strength is far smaller than the ground-wave in the service area of the radio beacon. In contra...
Electromagnetic radiation - Radio Waves, Frequency, Wavelength: Radio waves are used for wireless transmission of sound messages, or information, for communication, as well as for maritime and aircraft navigation. The information is imposed on the electr
wave, thewavelengthis inversely proportional to the frequency. Radio frequencies are not visible to the human eye. As the frequency is increased beyond that of the RF spectrum, electromagnetic energy takes the form of microwaves, infrared radiation (IR), visible, ultraviolet, X-rays and gamma ...
"We do not always find visible happiness in proportion to visible virtue" (Samuel Johnson). Frequency The property or condition of occurring at frequent intervals. Proportion The agreeable or harmonious relation of parts within a whole The statue seems out of proportion. Frequency The number of re...