A Photocell Is a Device That Operates Using the Photoelectric

question 28

Multiple Choice

A photocell is a device that operates using the photoelectric effect. What metal would enable a photocell to be operated using visible light?

• A) manganese (φ = 4.1 eV)
• B) lanthanum (φ = 3.5 eV)
• C) cesium (φ = 1.95 eV)
• D) beryllium (φ = 4.98 eV)

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