The needle of the speed-indicator flicked and wagged to and fro; the cinders rattled on the roof, and a whirl of dust sucked after the whirling wheels, The crew of the combination sat on their bunks, panting in their shirt- sleeves, and Cheyne found himself among them shouting old, old stories of the railroad that every trainman knows, above the ...
One of the main drawbacks to a digital TV signal or digital cable signal, for instance, is that it is an artificial reproduction of the original data, whereas an analog signal starts out as an exact copy of the original.
Best Answer: 1. The propagation speed of a wave is equal to its frequency times its wave length. As for any given set of conditions the propagation speed is constant, then if the frequency is doubled the wave length will be reduce by a factor of 2 (1/2 of the starting wave length).2.s for any given set of conditions the propagation speed is constant, then if the frequency is doubled the wave length will be reduce by a factor of 2 (1/2 of the starting wave length). 2.