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20 August, 14:03

A band of blue light has a velocity of 3.0 x 108

m/sec and a wavelength of 465 nanometers

(4.65 x 10? m). What is its frequency?

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Answers (1)
  1. 20 August, 14:31
    0
    Answer: 6.4 x 10^14Hz

    Explanation:

    velocity of blue light (V) = 3.0 x 10^8m/sec

    wavelength (λ) = 465 nanometers

    (4.65 x 10? m)

    Since 1nanometer = 1 x 10^-9 meter

    465 nanometer = 4.65 x 10^-7 meters

    frequency (F) = ?

    Recall that the frequency of a wave is the number of cycles the wave complete in one second, and its unit is Hertz.

    So, apply the formula V = F λ

    3.0 x 10^8m/sec = F x 4.65 x 10^-7 meters

    F = (3.0 x 10^8m/sec / 4.65 x 10^-7 meters)

    F = 6.4 x 10^14Hz

    Thus, the frequency of the blue light is 6.4 x 10^14Hz
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