complex permittivity การใช้

• Regarding wavelength dependence, see the " Complex permittivity " section.
• A more extended version was given in " Complex Permittivity " published in 1971.
• This quantity, hereafter referred to as the materials'" dielectric function, " is the complex permittivity.
• At the high-frequency limit, the complex permittivity is commonly referred to as " ? "  ".
• Several references in the literature use a form of the Cole equation written in terms of impedance instead of a complex permittivity.
• Some " physical quantities " may be actually complex valued-such as complex impedance, complex permittivity, complex refractive index.
• The complex permittivity is usually a complicated function of frequency " ? ", since it is a superimposed description of dispersion phenomena occurring at multiple frequencies.
• Once the complex permittivity of the material is known, we can easily calculate its effective conductivity \ sigma _ e and dielectric loss tangent \ tan \ delta as:
• The complex permittivity is evaluated over a wide range of frequencies by using different variants of dielectric spectroscopy, covering nearly 21 orders of magnitude from 10  " 6 to 10 15 Hz.
• Since the response of materials to alternating fields is characterized by a complex permittivity, it is natural to separate its real and imaginary parts, which is done by convention in the following way:
• :: Well, the simple answer is that the phase velocity of the EM field has to change when it propagates into a material with different complex permittivity and mattb @ 2007-01-31T16 : 05Z
• In addition, \ eta = \ sqrt { \ tfrac { \ mu } { \ epsilon } } where \ mu is the complex permeability and \ epsilon is the complex permittivity of the medium into which one is radiating.
• He showed how the spectral density of the dipole moment fluctuations of a dielectric body could be calculated from the frequency dependence of the complex permittivity ? ( ? ) = ?'( ? )  i? " ( ? ).
• :: : : Sorry, I just read the article again, but couldn't find information as to whether photons slow down in glass, nor could I extract from the complex permittivity section an explanation of why red light is faster than blue.
• It was hoped that the results of his 1959 report could be used to generalise the work of Onsager, Kirkwood and Fr鰄lich and to obtain a theory for the frequency dependence of the complex permittivity ? ( ? ) = ?'( ? )  i? " ( ? ).
• The Permittivity # Complex permittivity section has a nice graph that shows these different mechanisms . ( Complex permittivity is a fancy name for the absorption coefficient . ) You can see that the transmission of visible light is governed by electronic absorption : when the energy of a photon coincides with a difference in allowed electron orbits, the photon is absorbed, so the substance is opaque at that wavelength.
• The Permittivity # Complex permittivity section has a nice graph that shows these different mechanisms . ( Complex permittivity is a fancy name for the absorption coefficient . ) You can see that the transmission of visible light is governed by electronic absorption : when the energy of a photon coincides with a difference in allowed electron orbits, the photon is absorbed, so the substance is opaque at that wavelength.