Question

Calculate the frequency and the energy of the following:

A microwave at 2.6mm

Answer 1

given

wavelength of microwave = 2.6 mm.

now, we know that

c (speed of light) =frequency (v) * wavelength (λ)

c = 3 * 10⁸ m/s

therefore, frequency = 3*10⁸ m/s * 2.6 * 10^-3 m

frequency = 7.8 * 10⁵ sec^-1

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for energy,

we know that.

E = hc / λ = hv

h (planck constant) = 6.626176 x 10^-34 joule-seconds.

therefore,

E = 6.626176 x 10^-34 joule-sec * 7.8 * 10⁵ sec^-1

E = 5.168 x 10^-28 joule.

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