Question

Light of wavelength 3500 Å is incident on two metals A and B. Which of them will yield photoelectrons, if their work functions are 4·2 eV and 1·9 eV respectively ? Make the necessary calculations to justify your answer.

Give an example each of a metal from which photoelectric emission takes place when irradiated by (i) UV light (ii) visible light.

Ultra-violet light of wavelength 200 nm from a source is incident on a metal surface. If the stopping potential is –2.5 V, (a) calculate the work function of the metal, and (b) How would the surface respond to a high intensity red light of wavelength 6328 Å produced by a laser?

The work function for a certain metal is 4.2 eV. Will this metal give hotoelectric emission for incident radiation of wavelength 330 nm?