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17 December, 14:10

A line in the hydrogen spectrum occurs at 434 nm. what is the frequency of this radiation in sec - 1

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  1. 17 December, 14:25
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    The lines occurring in an emission spectrum are all electromagnetic waves, which means that their speed in a vacuum is

    3 x 10⁸ m/s

    We can use the equation,

    v = fλ

    which relates the velocity of a wave to the frequency and wavelength. Substituting values,

    3 x 10⁸ = f * 434 x 10⁻⁹

    f = 6.91 x 10¹⁴ Hz

    The frequency of the wave will be 6.91 x 10¹⁴ oscillations per second.
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