Light waves travel at 3 × 10 8 m/s. If the light wave has a particular wavelength of 400 nm (400 × 10 –9 m), calculate its frequency.

Question

Light waves travel at 3 × 10 8 m/s. If the light wave has a particular wavelength of 400 nm (400 × 10 –9 m), calculate its frequency.

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Dulcie 4 years 2021-09-03T19:43:58+00:00 1 Answers 18 views 0

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  1. thucuc
    0
    2021-09-03T19:45:43+00:00
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    Answer:

    f=7.5\times 10^{14}\ Hz

    Explanation:

    Given that,

    The wavelength of light, \lambda=400\ nm=400\times 10^{-9}\ m

    The speed of light, c=3\times 10^8\ m/s

    We need to find the frequency of light. We know that,

    c=f\lambda

    Where

    f is the frequency

    So,

    f=\dfrac{c}{\lambda}\\\\f=\dfrac{3\times 10^8}{400\times 10^{-9}}\\\\f=7.5\times 10^{14}\ Hz

    So, the frequency of light is 7.5\times 10^{14}\ Hz.

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