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20 May, 05:47

The range of wavelengths for visible light is from 3.9*10^-7m. What is the corresponding range of frequencies for visible light

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  1. 20 May, 05:52
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    from 7.69*10¹⁵ Hz

    Explanation:

    Frequency: This can be defined as the number of complete cycle a wave complete in one seconds, the S. I unit of frequency is Hertz (Hz).

    From the question,

    v = λf ... Equation 1

    Where v = speed of visible light in air, λ = wave length of visible light, f = frequency of visible light.

    make f the subject of the equation

    f = v/λ ... Equation 2

    Note: all electromagnetic wave have the same speed = 3*10⁸ m/s

    Given: v = 3*10⁸ m/s, λ = from 3.9*10⁻⁷ m

    Substitute into equation 2

    f = 3*10⁸ / 3.9*10⁻⁷

    f = 7.69*10¹⁵ Hz

    Hence the range of the frequencies for visible light = from 7.69*10¹⁵ Hz
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