The Threshold Wavelength for Photoelectric Emission of a Particular Substance

question 25

Multiple Choice

The threshold wavelength for photoelectric emission of a particular substance is 500 nm. What is the work function (in eV) ?

• A) 4.2
• B) 4.0 × 10−¹⁹
• C) 4.0 × 10−¹⁰
• D) 2.5 × 10−¹⁹
• E) 2.5

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