For a sine wave $x=A\sin(ωt+\varphi)$,
- $A$ is the amplitude
- $\omega$ is the frequency
- $\varphi$ is the phase
What is $(ωt+\varphi)$ called? "Angle"? I can't find any source call that part.
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$\begingroup$ Simple harmonic motion - physicskey.com/25/simple-harmonic-motion, sine wave - physicskey.com/35/… $\endgroup$– SaralDec 29, 2018 at 6:27
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2 Answers
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$\omega t + \varphi$ is called the phase. See this Wikipedia article for the details.
The symbol $\varphi$ is known variously as the phase shift, phase offset or phase constant.
answered Mar 24, 2018 at 14:03
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1$\begingroup$ Wikipedia is not an authority on the use is scientific or technical terminology. In common speech, $\varphi$ is called both the "phase" and the "phase offset", and probably other things, all determined by context. It is misleading to claim that there's a universal and consistent use of terms. $\endgroup$ Mar 25, 2018 at 17:00
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As with functions in general, the quantity inside $\sin$ here is called an argument.
