题目内容
The length of a complete wave shape is called wavelength.
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Energy, the shape of wave, & oscillatory (vibrational) state are transmitted by a wave, but the particles are not.
For waves, for each element, its energy increases when energy is transferred in, and its energy decreases when energy is transferred out.
Waves are a way of propagating (传播) energy.
In the wave equation, the origin (原点) of the axis must be selected at the wave source.
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