Scientific explanation: In physics, mathematics, and related fields, a wave is a propagating dynamic disturbance of one or more quantities, sometimes as described by a wave equation. In physical waves, at least two field quantities in the wave medium are involved.
The greeting: move one's hand to and fro in greeting or as a signal.
Answers & Comments
Answer:
a disturbance or variation that transfers energy progressively from point to point in a medium
Answer:
Scientific explanation: In physics, mathematics, and related fields, a wave is a propagating dynamic disturbance of one or more quantities, sometimes as described by a wave equation. In physical waves, at least two field quantities in the wave medium are involved.
The greeting: move one's hand to and fro in greeting or as a signal.
"he waved to me from the train"
Explanation: