The Total solution for NCERT class 6-12
Thework function for a certain metal is 4.2 eV. Will this metal give photoelectricemission for incident radiation of wavelength 330 nm?
No
Charge on an electron, e =1.6 × 10−19 C
Planck’s constant, h =6.626 × 10−34 Js
Wavelength of the incident radiation, λ =330 nm = 330 × 10−9 m
Speed of light, c = 3 × 108 m/s
The energy of the incidentphoton is given as:
.Itcan be observed that the energy of the incident radiation is less than the workfunction of the metal. Hence, no photoelectric emission will take place.