Now that the photon has been emitted and begins its flight, we are purely in a relativistic mode. Einsteins equations for space distortion and time dilation tell us that the path in front of the photon shrinks to zero and the time of flight shrinks to zero as well. This has always raised...
clinicians establish at the onset the parameters to be evaluated: object response rate, survival, disease-free survival or duration of response, and toxicity. The
[Band]inradio,theword"band"hastwomeanings.Oneisthe divisionofelectromagneticspectrum,suchaslongwave,short wave,ultrashortwaveandsoon.Thesecondisthedivisionof thefrequencyrangeofthetransmitter,receiverandother equipment.Ifthefrequencyrangeofworkisdividedinto severalparts,thesepartsarealsocalledband,forexample, ...
awe may consuder light to fall within this class because it is in the electromagnetic spectrum 因为它在电磁波频谱,我们也许属于的consuder光这类 [translate] a在一节音乐课上 In a music lesson [translate] aCracking reactions break the carbon-carbon bonds 裂化的反应打破碳碳束缚 [translate] a没有...
Huygens’ principle, a statement that all points of a wave front of sound in a transmitting medium or of light in a vacuum or transparent medium may be regarded as new sources of wavelets that expand in every direction at a rate depending on their veloci
These peaks indicate the state in which the densities of surface plasmon dipoles at the metal-dielectric boundary have the most significant and optimal response to the presence of an electromagnetic wave. Since the maxima in the scattering cross-section diagram occur at specific frequencies within ...
The distance between successive crests of a wave or higher points of electromagnetic waves is termed as wavelength. The frequency and wavelength are closely related to each other. But they are inversely proportionate to each other. The wavelength becomes shorter when the frequency is higher and the...
antenna. The lower the measurement the better. For a 50 Ohm system, it is recommended to have a minimum of -5dB or better measurement. Using the return loss to identify how the impedance of the antenna performs across the entire spectrum can help to estimate the bandwidth and operating ...
Maybe you have no idea, or have heard something vague about the water in the food wiggling in response to the microwaves. Do you know why microwaves and not some other part of the electromagnetic spectrum? Why the food spins on a platter? How the size of the oven relative to the wavelen...
传感器名词解释考试必备(Explanation of sensor terminology) 1. sensor: a device and device that senses a specified amount of measurement and translates into usable output signals in accordance with certain rules. 2. linearity of sensor: the maximum deviation between the actual characteristic curve of ...