Photoelectric Effect

[ASetlur_1G]

Why does the photoelectric experiment need to be done under a vacuum?

[katrinawong3d]

The photoelectric effect has to be done in a vacuum because it allows all frequencies to reach/travel to the sample.

[Sally kim 4F]

The photoelectric effect needs to be carried out in a vacuum because it will prevent less collision between the photo electrons and air molecules, which in turn will prevent energy loss.

[Omar Selim 1D]

It will allow the radiation to reach the intended object without collision

[Sadhana_Dicussion_4A]

The photoelectric experiment has to be done in a vacuum because electrons produced close to the threshold have a relatively low energy. Low energy electrons cannot travel very far in the air before they are defected by collisions and this makes then very difficult to detect without a vacuum.