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AP and TS EAMCET Engineering Model Paper 16

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Question : 121

Total: 160

The work function of the metals Li, Na, K, Mg, Cu and Ag respectively 2.4, 2.3, 2.2, 3.7,4.8 and 4.3 eV/atom. Photon of wavelength can eject electron from any of these metals. Photon of wavelength λ2 can eject electron from one of the above metals only. λ1 and λ2 respectively

258 nm, 563 nm
563 nm, 258 nm
288 nm, 516 nm
335 nm, 670 nm

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