TV, computer and cinema screens all flicker but provide the illusion of constant images because of the high frequencies at which they operate.
At the infra-red frequencies at which Spitzer looks, the light from the dust overwhelms that from the star.
Ultrasonic refers to those frequencies at which sound waves vibrate above the range of human hearing, whereas supersonic is usually used in connection with speeds faster than the various speeds of sound.
Each element has a unique set of energy levels, and so the frequencies at which it absorbs and emits light act as a kind of fingerprint, identifying the particular element.
Q also can be obtained from the average power graph as the ratio ωr/ ω2 − ω1), where ω1 and ω2 are the angular frequencies at which the average power dissipated in the circuit is one-half its maximum value.
The frequencies at which infrared radiation is absorbed correspond to the frequencies of the normal modes of vibration or can be considered as transitions between quantized energy levels, each of which corresponds to excited states of a normal mode.
The frequencies at which measured losses became minima corresponded to the calculation results by the plane-wave model.
The present models predict some terahertz critical frequencies at which the number of wave speeds changes.
The energy harvesting ratios of the structure is investigated especially for the resonance frequencies at which the maximum absorption occurs.
To accomplish this task, the program employs a database of frequencies at which typical emissions in meteor spectra appear.
Formant frequencies are the frequencies at which the local maxima of the speech signal spectrum envelope occur.
