group speed

noun

1. physics the speed at which energy is propagated in a wave. This is the quantity determined when one measures the distance which the radiation travels in a given time. In a medium in which the speed increases with wavelength the group speed is less than the phase speed, and vice versa

Example Sentences

I received notification that I could take a group speed awareness course or receive a fine and three points on my licence, which was clean at the time.

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“It’s a versatile group — speed, power and quickness. “And we’re pretty big too.”

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Faulconer agreed then to have the advisory group speed up its work.

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It was impossible to determine the size of each image of the group, speed, or altitude.

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