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The wavelength of the red part of visible light is 760nm. what is its energy​

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  • Réponse publiée par: jemuelpogi

    Problem:

    the wavelength of the red part of visible light is 760nm. What is its energy​?

    In order to solve for energy, we will first find its frequency. All electromagnetic wave will travel in a vacuum at a speed of                              3 × 10⁸ m/s.

    Solving for frequency:

    Given:

    speed = 3 × 10⁸ m/s

    wavelength =  760 nm which is equivalent to 0.00000076 meter

           760 nm × 1 m/1,000,000,000 = 0.00000076 m

    frequency = ? unknown

    Solution:

    To solve for frequency you will used the formula                                                   frequency = speed/wavelength (f=cλ)

    f = 3 × 10⁸ m/s ÷ 0.00000076 m

     = 3 × 10⁸ m/s ÷ 7.6 × 10-⁷ m

     =      0.3947 × 10 ¹⁵  /s

      =       3.947  × 10¹⁴ Hz

    Frequency is equal to 3.947  × 10¹⁴ Hz

    Solving for energy

    Given:

    frequency = 3.947  × 10¹⁴ Hz

    h = 6.63 x 10-³⁴ Joules

    Energy = unknown

    solution:

    We can use the formula E=hf

    E=hf

      = 6.63 x 10-³⁴ Joules/s  × 3.947  × 10¹⁴ /s

      =  26.169 x 10 -²⁰  Joules

      = 2.6169   x 10 - ¹⁹ Joules

    Final

    Energy is 2.6169   x 10 - ¹⁹ Joules

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  • Réponse publiée par: meteor13

    answer:

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    explanation:

  • Réponse publiée par: 123gra
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The wavelength of the red part of visible light is 760nm. what is its energy​...