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
E
Physics & Space Science
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Fill in the blank(s) with correct word
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