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    Exam 40: Introduction to Quantum Physics
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    The Threshold Wavelength for Photoelectric Emission of a Particular Substance
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The Threshold Wavelength for Photoelectric Emission of a Particular Substance

Question 25

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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