Photons

Photons

1. λ=c/f

   • f - frequency in Hz
   • c - speed of light in a vacuum (3.00 x 10^-8 ms^-1)
   • λ - wavelength in m

2. E = hf

   • E - energy of one photon in J
   • h - Planck's constant (6.63 x 10^-34 Js)
   • f - frequency of light in Hz

3. When Max Planck was investigating black body radiation he suggested that EM waves can only be released in discrete packets, or quanta

4. Einstein went further by suggesting that EM waves (and the energy they carry) can only exist in discrete packets. He called these wave-packets photons.

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