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E41.811019JE37.511019JE21.051018JE11.651018J (a) What is the wavelength of the photon needed to excite an electron from E1 to E4 ? 10m (b) What is the energy

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E41.811019JE37.511019JE21.051018JE11.651018J (a) What is the wavelength of the photon needed to excite an electron from E1 to E4 ? 10m (b) What is the energy (in joules) a photon must have in order to excite an electron from E2 to E3 ? 10J (c) When an electron drops from the E3 level to the E1 level, the atom is said to undergo emission. Calculate the wavelength of the photon emitted in this process

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