A physicist wishes to eject electrons by shining light on a metal surfac. The light source
Channel: Doubtnut
Date: 2020-08-30

A physicist wishes to eject electrons by shining light on a metal surfac. The light source emits light of wavelenght of 450 nm. The table lists the only available metals and their  work functions. `{:("Metal",W_(0)(eV)),("Barium",2.5),("Lithium",2.3),("Tantalum",4.2),("Tungsten",4.5):}` Which metal(s) can be used to produce electrons  by the photoelectric effect from given source of light?