Given a traveling wave [itex] W=Asin(\omega t + \phi)[/itex], where A is the amplitude, [itex] \omega [/itex] is the angular frequnecy, t is the time variable, and [itex]\phi [/itex] is the phase angle.(adsbygoogle = window.adsbygoogle || []).push({});

For two waves of the same properties and traveling in the same direction, the waves vanish if the phase angle is 180 degrees. The amplitudes are doubled if the phase angle is zero or 360 degrees.

For two waves of the same properties and traveling in opposite directions, the waves formed standing waves if the phase angle is 180 degrees. What happens when the phase angle is zero or 360 degrees?

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# In-Phase and Out-Phase

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