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(A) The quantum nature of $EM$ radiation is supported by phenomena that involve the interaction of light as discrete packets of energy,known as photon

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$(1)$ and $(2)$

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(A) The quantum nature of $EM$ radiation is supported by phenomena that involve the interaction of light as discrete packets of energy,known as photons.$(1)$ The Photoelectric effect demonstrates that light consists of photons with energy $E = h
u$,which eject electrons from a metal surface.$(2)$ The Compton effect involves the scattering of photons by electrons,confirming that photons behave like particles with momentum $p = h/\lambda$.$(3)$ The Doppler effect is a wave phenomenon applicable to both classical waves and quantum particles.$(4)$ The Field effect is related to semiconductor physics and does not specifically support the quantum nature of $EM$ radiation.Therefore,both the Photoelectric effect and the Compton effect provide evidence for the quantum nature of $EM$ radiation.

Which of the following effects support the quantum nature of $EM$ radiation? $(1)$ Photoelectric effect $(2)$ Compton effect $(3)$ Doppler effect $(4)$ Field effect

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