a) Photons

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4 Terms

1
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  • define photon


  • a quantum of energy of EM radiation


2
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  • state what the existence of photons implies about the nature of EM radiation


  • EM radiation has a particulate nature


3
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  • state Planck’s constant


  • 6.63 × 10-34Js


4
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  • state the two formulas for the energy of a photon


  • E = hf

    • energy of a photon (J) = Planck’s constant (Js) × frequency of the EM radiation (Hz)

  • E = hc/λ

    • energy of a photon (J) = ( Planck’s constant (Js) × speed of light (ms-1) ) / wavelength of the EM radiation (m)