Question

17. A microwave has a wavelength of 3 cm and a speed of 3 x 108 m/s. Calculate the frequency.

Answer 1

Important Formulas:

`v=\lambda f`

velocity(measured in m/s) = wavelength(measured in meters) * frequency(measured in hertz)

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Given:

`\lambda=0.03m` (cm to m)

`v=300,000,000m/s` (speed of light)

`f=?`

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Rearranging formula for velocity to make frequency the subject:

`v=\lambda f`

`(v)/(\lambda) =(\lambda f)/(\lambda)`

`f=(v)/(\lambda)`

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Finding frequency:

`f=(v)/(\lambda)`

`f=(300,000,000)/(0.03)`

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Answer:

`\boxed{f = 1*10^(10) Hertz}`