A source EM radiation strikes a sheet of iron with work func- tion W = 4.5...

 

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A source EM radiation strikes a sheet of iron with work func- tion W₁ = 4.5 eV. The stopping voltage required to bring all the ejected electrons to a halt is measured to be V₁ = 3.0 V. If this same source of EM radiation were to strike a sheet of calcium with work function W₂ = 2.9eV, what would be the maximum speed of the ejected electrons? For the representa- tion, make sure to include a diagram of the incoming photon, the metal sheet, and the outgoing electron, with all relevant energy values labeled. Representation: 0 1 2 2 Physics Concept(s): 0 1 Initial Equation(s): 0 0.5 1 Symbolic Answer: Units Check: Neatness: 0 1 0.5 1 -1 0 Total: Correct Answer: 0 -2 YN A source EM radiation strikes a sheet of iron with work func- tion W₁ = 4.5 eV. The stopping voltage required to bring all the ejected electrons to a halt is measured to be V₁ = 3.0 V. If this same source of EM radiation were to strike a sheet of calcium with work function W₂ = 2.9eV, what would be the maximum speed of the ejected electrons? For the representa- tion, make sure to include a diagram of the incoming photon, the metal sheet, and the outgoing electron, with all relevant energy values labeled. Representation: 0 1 2 2 Physics Concept(s): 0 1 Initial Equation(s): 0 0.5 1 Symbolic Answer: Units Check: Neatness: 0 1 0.5 1 -1 0 Total: Correct Answer: 0 -2 YN

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