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(B) The concept that photons carry energy is fundamentally linked to the interaction of radiation with matter. While $Bohr's$ theory describes energy

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Compton's effect

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(B) The concept that photons carry energy is fundamentally linked to the interaction of radiation with matter. While $Bohr's$ theory describes energy levels in atoms,the experimental evidence that photons possess momentum and energy,and can transfer this energy to electrons,was definitively established by the $Compton$ effect. In the $Compton$ effect,an $X$-ray photon collides with an electron,transferring a portion of its energy and momentum to the electron,which confirms the particle-like nature of light and the energy-carrying capacity of photons.

The fact that photons carry energy was established by

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