9. [3] A cordless phone operates at 900 MHz. What is the wavelength of the electromagnetic wave used by this phone?
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Step 1: Recall the formula for calculating wavelength: \(\lambda = \frac{c}{f}\), where \(\lambda\) is the wavelength, \(c\) is the speed of light (approximately \(3 \times 10^8\) m/s), and \(f\) is the frequency. Show more…
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