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Q22. The work function of a substance is 4 eV. What is the approximate longest wavelength of light that can cause photo-emission ?

Physics — Dawn of Modern Physics — Question 22 of 217

A. 309 nm
B. 209 nm
C. 109 nm
D. 9 nm

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The work function of a substance is 4 eV. What is the a... | Physics MCQ #22 | Examora | Examora