Properties of Waves 1. Radio waves travel at the speed of light (3.00 x 10 m/s). An amateur radio system can receive radio signals at frequencies between 8.00 MHz and 1.20 MHz. What is the range of the wavelengths this system can receive? 2. Graph (a) below describes the density versus time of a pressure wave traveling through an elastic medium. Graph (b) describes the density versus distance for the same wave. 20.00 80.00 o.b2 Tna la 40LU0 Distance n) 0.00 0.01 0,03 0.04 0.00 60,00 a. Use graph (a) to find the period of oscillation of this wave and its frequency.

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Speed of light

The speed at which the light travels in a vacuum is unbiased for both the source and inertial frame of reference of the observer. This was postulated by the physicist, Albert Einstein, by observing the theory of electromagnetism of Maxwell. Also, there was no evidence for the luminiferous aether, that is, the medium for the propagation of light where the electromagnetic field exists.