Const = physconst(Name)
Character vector that indicates which physical constant the function returns. Values are not case sensitive.
Value of physical constant specified in the input argument
Determine the wavelength of a 1 Ghz electromagnetic wave.
freq = 1e9; lambda = physconst('LightSpeed')/freq
lambda = 0.2998
Approximate the thermal noise power per unit bandwidth in the I and Q channels of a receiver.
Specify the receiver temperature and Boltzmann constant.
T = 290; k = physconst('Boltzmann');
Compute the noise power per unit bandwidth, split evenly between the in-phase and quadrature channels.
Noise_power = 10*log10(k*T/2);
This table lists the supported constants and their values in SI units.
|Speed of light in vacuum||299,792,458 m/s. Most commonly denoted by c.|
|Boltzmann constant relating energy to temperature||J/K. Most commonly denoted by k.|
|Mean radius of the Earth||6,371,000 m|
Usage notes and limitations:
Does not support variable-size inputs.