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Intensity of a wave vs. amplitude. Intensity of a wave’s radiation at a certain distance from the source. Transmitted intensity of light incident on a polariser (Malus’s law).
Define amplitude, frequency, period, wavelength, and velocity of a wave; Relate wave frequency, period, wavelength, and velocity; Solve problems involving wave properties
Symbols representing physical quantities, units, mathematical operations and relationships, astronomical bodies, constellations, and the Greek alphabet.
The amplitude, wave number, and angular frequency can be read directly from the wave equation: \begin{align*} y(x, t)=& A \sin (k x-w t)=0.2 \: \mathrm{m} \sin \left(6.28 \: \mathrm{m}^{-1} x-1.57 \: \mathrm{s}^{-1} t\right) \nonumber \\
A wave’s amplitude is the maximum distance (positive or negative) a wave reaches from its rest position. Wavelength is the distance between the same spot on two sections of a wave. A wave’s frequency can be measured by how many crests (or how many troughs) pass a location in a certain amount of time.
29 Απρ 2020 · The phase velocity is the rate at which the phase of the wave propagates in space. The group velocity is the rate at which the wave envelope, i.e. the changes in amplitude, propagates. The wave envelope is the profile of the wave amplitudes; all transverse displacements are bound by the envelope profile.
Amplitude. A wave’s maximum displacement from the equilibrium position (units are m) Frequency, f. The number of complete oscillations passing through a point per second, (units are Hz) Wavelength, λ. The length of one whole oscillation (e.g. the distance between successive peaks/troughs) (units are m) Speed, c.
