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  2. Scattering parameters - Wikipedia

    en.wikipedia.org/wiki/Scattering_parameters

    Note the format of the parameter notation SXYab, where "S" stands for scattering parameter or S-parameter, "X" is the response mode (differential or common), "Y" is the stimulus mode (differential or common), "a" is the response (output) port and b is the stimulus (input) port.

  3. S-matrix - Wikipedia

    en.wikipedia.org/wiki/S-matrix

    In physics, the S-matrix or scattering matrix is a matrix that relates the initial state and the final state of a physical system undergoing a scattering process.It is used in quantum mechanics, scattering theory and quantum field theory (QFT).

  4. List of common physics notations - Wikipedia

    en.wikipedia.org/wiki/List_of_common_physics...

    Meaning SI unit of measure alpha: alpha particle: angular acceleration: radian per second squared (rad/s 2) fine-structure constant: unitless beta: velocity in terms of the speed of light c: unitless beta particle: gamma: Lorentz factor: unitless photon: gamma ray: shear strain: radian

  5. Frequency selective surface - Wikipedia

    en.wikipedia.org/wiki/Frequency_selective_surface

    A frequency-selective surface (FSS) is a thin, repetitive surface (such as the screen on a microwave oven) designed to reflect, transmit or absorb electromagnetic fields based on the frequency of the field.

  6. Talk:Reflection coefficient - Wikipedia

    en.wikipedia.org/wiki/Talk:Reflection_coefficient

    If you accept that the reflection coefficient is equivalent to the S11 scattering parameter of the load, and that Z0 is the impedance the load sees looking out of its port, i.e. the source impedance, then the formula as written contradicts the definition of S11 (see Scattering_parameters). S11 is defined as b1/a1; a1 is defined as (1/2) K1 (V1 ...

  7. Jones calculus - Wikipedia

    en.wikipedia.org/wiki/Jones_calculus

    These rotations are identical to beam unitary splitter transformation in optical physics given by R ( θ ) = ( r t ′ t r ′ ) {\displaystyle R(\theta )={\begin{pmatrix}r&t'\\t&r'\end{pmatrix}}} where the primed and unprimed coefficients represent beams incident from opposite sides of the beam splitter.

  8. Mathematical descriptions of opacity - Wikipedia

    en.wikipedia.org/wiki/Mathematical_descriptions...

    absorption coefficient is essentially (but not quite always) synonymous with attenuation coefficient; see attenuation coefficient for details; molar absorption coefficient or molar extinction coefficient , also called molar absorptivity , is the attenuation coefficient divided by molarity (and usually multiplied by ln(10), i.e., decadic); see ...

  9. Theory of sonics - Wikipedia

    en.wikipedia.org/wiki/Theory_of_sonics

    Physics Elementary physical principles Description Figure I. Suppose the crank a to be rotating uniformly, causing the piston b to reciprocate in the pipe c, which is full of liquid. At each in stroke of the piston a zone of high pressure is formed, and these zones, shown by shading, travel along the pipe away from the piston; between every ...