The wavelength of an infrared wave with a given frequency is 7.14 x 10⁻⁵ m.
Frequency is the number of cycles per second moved by the wave.
The frequency and wavelength is related as
λ = c/f
where c = velocity of sound wave in vacuum = 3×10⁸ m/s
Given is the frequency of the infrared wave f = 4.2×10^14, then wavelength will be
λ = 3 x10⁸ / 4.2 x 1
λ = 7.14 x 10⁻⁵ m
Thus, the wavelength of an infrared wave with a given frequency is 7.14 x 10⁻⁵ m
Learn more about frequency.
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