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10 May, 19:40

What is the wavelength of an infrared wave with a frequency of 4.2 x1014 Hz?

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  1. 10 May, 20:04
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    Using

    π = c/f

    where c = velocity of EM waves in vacuum = 3*10^8 ms-¹

    f = 4.2*10^14

    π = 3/4.2 * 10^ (8-14)

    π = 0.714 * 10 ^-6

    π = 7.14*10^-5 m
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