Explain the following giving reasons : In the wave picture of light, intensity of light is determined by the square of the amplitude of the wave. What determines the intensity of light in the photon picture of light?

In the photon picture of light, intensity is determined by the number of photons per unit area per unit time. Higher photon flux corresponds to greater intensity because each photon carries a discrete amount of energy, proportional to its frequency (E = hν).

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