A mobile phone communicates using an electromagnetic (radio) wave of frequency

PHYSICS · Multi-part · A Level · Physics · Waves · Waves

Problem

A mobile phone communicates using an electromagnetic (radio) wave of frequency 900 MHz900\,\text{MHz}. Answer the following: (a) Calculate the time period of this wave in seconds. (b) Express the time period obtained in part (a) in nanoseconds (1 ns=10−9 s)(1\,\text{ns}=10^{-9}\,\text{s}). (c) Determine the number of complete oscillations this wave makes in 1.0 ms1.0\,\text{ms}. (1 ms=10−3 s)(1\,\text{ms}=10^{-3}\,\text{s})

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