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bonufazy [111]
3 years ago
12

A cellular telephone transmits electromagnetic waves at a frequency of 835 mhz. what is the wavelength of these waves?

Physics
1 answer:
fredd [130]3 years ago
4 0
 HI!

instead of just giving you the answer, i will help you to understand it in simple terms.

As electromagnetic waves (read: light) move forwards it 'vibrates' up and down. The <em>frequency</em> of light tells us how many up-down vibrations it makes each second (1hz = 1 up-down vibration <em>per second</em> & 1mhz = 1 million up-down vibrations<em> per second</em>). Each individual vibration is called one <em>wave</em>.

<em>S</em>ince we <em>also</em> know how many meters light travels in 1 second (<em>290,000,000 meters</em>), we can easil<em>y </em>see that (<em>in the case of this specific question</em>) every '290,000,000' meters, there are '835,000,000' vibrations or <em>waves</em>.

It's then just a simple division to work out what is the length of just one wave! - <em>which is what we call the wavelength of light at that frequency</em>.

290,000,000 / 835,000,000 = 0.34m (<em>or 34cm</em><em />)
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