The electron kinetic energy versus photon frequency due to the photoelectric eff

Question

The electron kinetic energy versus photon frequency due to the photoelectric effect of three different materials is shown K) max materialA material HB material C 1) Which material requires the less energetic photons to have electrons ejected? Material A Material B Material c Submit You currently have 0 submissions for this question. Only 2 submission are allowed. You can make 2 more submissions for this question Survey Question) 2) Briefly explain your answer to the previous question Submit You currently have 0 submissions for this question. Only 2 submission are allowed You can make 2 more submissions for this question

Explanation / Answer

1. material a

the graph shows that material A starts emitting photoelectrons when exposed to 'fo' frequency which is the least among the three and photon energy is directly proportional to photon frequency. So A requires least energetic photons.

3. only materials A and B will have electrons ejected.

this is because 3fo is more than the threshold frequency of material A and B but less than that of material C. So only materials A and B will emit photoelectrons but C will not.

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