Optical theorem

In physics, the optical theorem is a general law of wave scattering theory, which relates the forward scattering amplitude to the total cross section of the scatterer. It is usually written in the form

where f(0) is the scattering amplitude with an angle of zero, that is, the amplitude of the wave scattered to the center of a distant screen, and k is the wave vector in the incident direction. Because the optical theorem is derived using only conservation of energy, or in quantum mechanics from conservation of probability, the optical theorem is widely applicable and, in quantum mechanics, $\sigma_\mathrm{tot}$ includes both elastic and inelastic scattering. Note that the above form is for an incident plane wave; a more general form invented by Werner Heisenberg can be written

单词	Optical theorem
释义	Optical theorem 英语百科 Optical theorem In physics, the optical theorem is a general law of wave scattering theory, which relates the forward scattering amplitude to the total cross section of the scatterer. It is usually written in the form where f(0) is the scattering amplitude with an angle of zero, that is, the amplitude of the wave scattered to the center of a distant screen, and k is the wave vector in the incident direction. Because the optical theorem is derived using only conservation of energy, or in quantum mechanics from conservation of probability, the optical theorem is widely applicable and, in quantum mechanics, $\sigma_\mathrm{tot}$ includes both elastic and inelastic scattering. Note that the above form is for an incident plane wave; a more general form invented by Werner Heisenberg can be written
随便看	simplex criterion的意思 simplex crusher的意思 simplex dermatitis的意思 simplex design的意思 simplex designs的意思 Simplex,Diabetic Mononeuropathy的意思 simplex dialling的意思 simplex double acting pump的意思 simplex drawing的意思 simplex duplex pump的意思 simplexduplex pump的意思 simplexed circuit的意思 simplex的意思 simplex evolutionary method的意思 simplex fabric的意思 simplex filter的意思 simplex flyer frame的意思 simplex fly frame的意思 Simplex,Glaucoma的意思 simplex group of chromosome的意思 simplex group of chromosomes的意思 simplex herpes of mouth的意思 simplex icterus的意思 simplex idea的意思 simplexin的意思