If the threshold wavelength for sodium is 5420 -A- then the work function of sodium is

W_0 =12375/λ_0 =12375/5420=2.28eV ...

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Standard XI

Physics

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If the thresh...

Question

If the threshold wavelength for sodium is $5420 \circ A$ , then the work function of sodium is

4.58 eV

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2.28 eV

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1.14 eV

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0.23 eV

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Solution

The correct option is B
2.28 eV

$W_{0} = \frac{12375}{λ_{0}} = \frac{12375}{5420} = 2.28 e V$

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If the threshold wavelength for sodium is 5420 ∘A, then the work function of sodium is

The correct option is B 2.28 eV W0=12375λ0=123755420=2.28eV

If the threshold wavelength for sodium is $5420 \circ A$ , then the work function of sodium is

The correct option is B
2.28 eV

$W_{0} = \frac{12375}{λ_{0}} = \frac{12375}{5420} = 2.28 e V$