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Work function of tungsten and sodium are 4.5 eV and 2.3 eV respectively.

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Work function of tungsten and sodium are 4.5 eV and 2.3 eV respectively. If threshold wavelength for sodium is 5460A, threshold frequency for tungsten will be……….. 

(A) 1015 Hz 

(B) 1.1 × 1015 Hz 

(C) 1.2 × 1015 Hz 

(D) 1.4 × 1015 Hz

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The correct option is (B) 1.1 × 1015 Hz.

Explanation:

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