The work function of lithium and copper are 2.3 eV and 4.0 eV respectively. Which of these metals will be useful for the photo-electric cell working with visible light? Explain.

Work function of lithium and copper are respectively 2.3 eV and 4.0 eV . Which one of the metal will be useful for the photoelectric cell working with visible light ? (h = 6.6 xx 10^(-34) J - s, c = 3 xx 10^(8) m//s)

Work function of lithium and copper are respectively 2.3 eV and 4.0 eV . Which one of the metal will be useful for the photoelectric cell working with visible light ? (h = 6.6 xx 10^(-34) J - s, c = 3 xx 10^(8) m//s)

The work function for sodium and copper are 2.0 eV and 4.0 eV respectively. Find by calculation which of the two will be used for the photoelectric cell to work with light of wavelength 4000overset@A .

Work function of sodium and copper is 2.3 eV and 4.5 eV respectively.Ratio of their threshold wavelength will be…..

The work functions for sodium and copper are 2 eV and 4 eV . Which of them is suitable for a photocell with 4000 Å light ?

Work functions for metals A and B are 2 eV and 4 eV respectively. Which metal has a lower threshold wavelength and why ?

The work functions of potassium and sodium are 4.5 eV and 2.3 eV respectively. The approximate ratio of their threshold wavelength will be -

The work function for potassium and caesium is 2.25 eV and 2.14 eV, respectively: with light of wavelength 5180overset@ A?

Work functions of copper and cesium are 4.5 eV and 1.9 eV, respectively. What are the corresponding threshold frequencies for these metals ?