A cordless phone transmits at 900 MHz at a power of 10 mW. Since this is...

A cordless phone transmits at 900 MHz at a power of 10 mW. Since this is in air, the speed of the wave is essentially 3.00x10⁸ m/s.

What is the wavelength of the electromagnetic wave coming from the phone?
What is the power per area 0.030 m away from the phone? Assume a spherical propagation of energy and the area of a sphere is 4pr²
What are the maximum electric (E₀) and magnetic field (B₀) strengths at 0.030 m from the phone?

Solutions

Expert Solution

If E_0 and B_0 be the maximum electic field and maximum magnetic field then for em wave,

Also Intensity I = P/A i.e.power per unit area.

genius_generous answered 1 year ago

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