Directions: Show all work, including equations and substitutions with units... An electron in a mercury atom makes a direct transition from the h-level to the b- level. The photon that is emitted becomes incident on a lithium plate with a work function of 2.9 eV. 1. What is the energy of the photon that is emitted? 2. What is the frequency of this emitted photon? 3. What type of electromagnetic wave is the emitted photon?

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