Five elements A,B,C,DandE have work functions 1.2eV,2.4eV,3.6eV,4.8eVand6.8eV respectively. If light of wavelength 4000A∘ is allowed to fall on these elements, then photoelectrons are emitted by
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Q3
The threshold wavelength for a metal with work function W0 is λ0. What is the threshold wavelength for a metal whose work function is W02?
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Q4
Five elements A,B, C, D and E have work functions 1.2eV, 2.4eV. 3.6eV, 4.8eV adn 6 eV respectively. If light of wavelength 4000 A is allowed to fall on these elements, then photoelectrons are emitted by