II. A photocell uses a sodium cathode. Sodium has a threshold wavelength of 536 nm. a. Find the work function of sodium (in eV). b. If ultraviolet radiation with a wavelength of 348 nm falls on sodium, what is the energy of the ejected photoelectrons (in eV)? III. Consider the Bohr model of the doubly ionized Lithium atom (Lithium has Z=3). a. What are the three lowest allowed energies E1, E2, and Ez.of the electron (in eV)? b. What are the different energies of photons that can be emitted when the electron undergoes transitions from the third level Eg to lower energy levels? c. Which of the preceding transitions results in the longest wavelength photon?

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A photocell uses a sodium cathode. Sodium has a threshold wavelength of 536 nm.

II. A photocell uses a sodium cathode. Sodium has a threshold wavelength of 536 nm.

a. Find the work function of sodium (in eV).

b. If ultraviolet radiation with a wavelength of 348 nm falls on sodium, what is the energy of the ejected photoelectrons (in eV)?

III. Consider the Bohr model of the doubly ionized Lithium atom (Lithium has Z=3).

a. What are the three lowest allowed energies E1, E2, and Ez.of the electron (in eV)?

b. What are the different energies of photons that can be emitted when the electron undergoes transitions from the third level Eg to lower energy levels?

c. Which of the preceding transitions results in the longest wavelength photon?

Expert Solution

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genius_generous answered 2 years ago

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