If threshold wavelength for sodium is 6800 A then the work function will beA- 1-8 eVB- 2-1 eVC- 2-5 eVD- 1-4 eV

The correct option is A 1.8 eV W_0 =12375/6800=1.8eV ...

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If threshold wavelength for sodium is $6800 \circ A$ then the work function will be

1.8 eV

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2.5 eV

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2.1 eV

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1.4 eV

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