How Is Light Intensity Explained in Particle Theory?

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In particle theory, light intensity is linked to the number of photons hitting a surface rather than the energy of individual photons, which is determined by frequency. While classical wave theory relates intensity to the amplitude of electric and magnetic fields, particle theory focuses on the energy carried by photons. The intensity of light can be quantified as power per unit area, indicating how much energy is delivered per second. Each photon contributes energy, and thus, a higher intensity corresponds to a greater number of photons. Understanding this relationship clarifies the role of intensity in the context of particle theory.
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In the classical wave theory of light, intensity was associated with the squares of the
maximum amplitudes of the electric and magnetic fields. In the particle theory of light, what
property is associated with the intensity of the light?

I know that according to the particle theory, the kinetic energy of the electrons ejected from a metal does not depend on the intensity of light directed at the metal, but rather on of the frequency of the light. However, this doesn't really answer the question. Can someone please explain to me the role of intensity in the particle theory of light?
Thanks!
 
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Light intensity can be measured as power per unit area. Power is how much energy is arriving per second due to the light. You know each photon carries some energy, so can you now think of how intensity and photons might be related.
 

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