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6 August, 08:21

A photon has an energy of 5.53 * 10-17 j. what is its frequency in s-1 (h = 6.63 * 10-34 j • s) ?

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  1. 6 August, 08:49
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    Given: Energy E = 5.53 X 10⁻¹⁷ J; Velocity of light c = 2.998 x 10⁸ m/s

    Planck's constant h = 6.63 x 10⁻³⁴ J. s

    Required: Frequency f = ?

    Formula: E = hc/λ and Frequency f = V/λ

    λ = (6.63 x 10⁻³⁴ J. s) (2.998 X 10⁸ m/s) / (5.53 x 10⁻¹⁷ J)

    λ = 3.59 X 10⁻⁹ m

    For Frequency f = ?

    f = c/λ

    f = 2.998 x 10⁸ m/s/3.59 x 10⁻⁹m

    f = 8.35 x 10¹⁶ Hz
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