How long does it take for a short pulse of light to travel from one end of the glass to the other? Express your answer in terms of the frequ

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How long does it take for a short pulse of light to travel from one end of the glass to the other? Express your answer in terms of the frequency, f. Use the numeric value given for n in the introduction.

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Kim Chi 3 months 2021-08-06T10:07:17+00:00 1 Answers 29 views 0

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    2021-08-06T10:08:27+00:00

    Complete Question:

    A beam of light from a monochromatic laser shines into a piece of glass. The glass has thickness Land index of refraction n=1.5. The wavelength of the laser light in vacuum is L/10 and its frequency is f. In this problem, neither the constant c nor its numerical value should appear in any of your answers.

    How long does it take for a short pulse of light to travel from one end of the glass to the other?


    Express your answer in terms of the frequency, f. Use the numeric value given for n in the introduction.

    Answer:

    15/f

    Explanation:

    Wavelength of the laser light, λ = L/10

    Where L = Distance covered by the light

    Refractive index, n = 1.5

    Speed, v = λf

    Since we are considering the laser light, the speed of light, c, will be used.

    c = v

    c = λf

    c = (L/10)f

    speed = \frac{distance}{time}

    (L/10)f = L/t

    f/10 = 1/t

    t = 10/f

    since the refractive index, n = 1.5

    t = 1.5(10/f)

    t = 15/f

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