# Define the Term "Intensity" in the Photon Picture of Electromagnetic Radiation. - Physics

#### Question

Short Note

Define the term "Intensity" in the photon picture of electromagnetic radiation.

#### Solution

The intensity I is defined as the total amount of energy falling on a given surface/Region per unit time 'rand per unit area A:

If the total energy emitted = nhv

Then, I = (nhν)/(At)

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