Which alkali metal does not exhibit photoelectric effect:
Lithium
Potassium
Cesium
Sodium
Lithium has high ionization energy. So, it does not lose its electrons easily and hence does not exhibit photoelectric effect.
Why are potassium and cesium, rather than lithium used in photoelectric cells?
Cesium can be used for photoelectric cells not lithium. Why?
The following data is observed in the photoelectric effect experiment when cesium was usedas metal. The threshold frequency of the metal is