Question

Read full.. The work function of the following metal is given Na = 2.75 eV, K = 2.3 eV, Mo = 4.14 eV, Ni = 5.15 eV which of these metal will not give a photoelectric emission for radiation of wave length 3300 A0 from a laser
source placed at 1m away from the metal. What happens if the laser is brought nearer and placed 50 cm away ?​ Want video call..??? only 18+​

Answer 1

Answer:

Only sodium and potassium show photoelectric emission

Explanation:

Hey there!!

For photoelectric emission to take place, the energy of incident radiation (E) must satisfy

=> E>ø where ø is work function

Refer the attachement for detailed solution!!

Also once the source is brought closer, the intensity increases, so more number of photoelectrons are emmitted as a result,

But this doesn't change the incident energy of radiations, so Ni and Mo still don't show photoelectric emission

Hope this answer helped you ✌