A laptop computer communicates with a router wirelessly, by means of radio signa

Question

A laptop computer communicates with a router wirelessly, by means of radio signals. The router is connected by cable directly to the Internet. The laptop is 7.4 m from the router, and is downloading text and images from the Internet at an average rate of 248 Mbps, or 248 megabits per second. (A bit, or binary digit, is the smallest unit of digital information.) On average, how many bits are downloaded to the laptop in the time it takes the wireless signal to travel from the router to the laptop? 1 bits

Explanation / Answer

    distance, d = 7.4 m     velocity of radio signals, V = 3 X 108 m/s     time taken by the signal to travel from routerto laptop, t = d / V                                                                                          = 7.4 / 3 X 108                                                                                         = 2.467 X 10 -8 s     downloading rate, R = 248 Mbps = 248 X 106 bits per second     number of bits downloaded = R t = 248 X 106 * 2.467 X 10 -8                                               = 6.12                                               = 6 bits

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