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The work function of photometal is 6.626 eV. What is the threshold wavelength?

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The work function of photometal is 6.626 eV. What is the threshold wavelength?

(a) 3921 Å

(b) 1875 Å

(c) 1867 Å

(d) 4433 Å

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Correct answer is (b) 1875 Å

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