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| a progressive disturbance propagated in a medium without progress or advance by the points themselves, as in the transmission of sound or light |
| the removal of energy or particles from a beam by the medium through which the beam propagates |
| angular velocity | |
| —n | |
| ω the velocity of a body rotating about a specified axis measured as the rate of change of the angle subtended at that axis by the path of the body | |
| angular velocity
The rate of change of an angle associated with an object with respect to some reference point. For example, the average angular velocity of an object moving around a central reference point once every second is 2π radians per second; the Earth spins around its axis with an angular velocity of 2π radians per day. Also called angular frequency. |
angular velocity
time rate at which an object rotates, or revolves, about an axis, or at which the angular displacement between two bodies changes. In the , this displacement is represented by the angle theta between a line on one body and a line on the other
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