Show that the wavelength of electromagnetic radiation is equal to the de-Broglie wavelength of its quantum (photon).

Explanation

To show that the wavelength of electromagnetic radiation is equal to the de Broglie wavelength of its quantum (photon), we can follow these steps:

### Step 1: Understand the relationship between energy, frequency, and wavelength of a photon
The energy \( E \) of a photon is given by the equation:
\[ E = h \nu \]
where:
- \( E \) is the energy of the photon,
- \( h \) is Planck's constant, and
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