Answered: electromagnetic radiation Eo (eV) 2.30…

electromagnetic radiation Eo (eV) 2.30 Element Potassium ammeter evacuated tube Sodium 2.75 Aluminum 4.28 Tungsten 4.55 voltmeter Copper 4.65 Iron 4.70 Gold 5.10 battery

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Question

The diagram below shows the experimental set-up for observing the
photoelectric effect. The table provides values for the work function for several elements. (The work function is the amount of energy required to free the outermost electron from that element.)

It is found that a certain voltage stops the current from flowing around the circuit. When the experiment is repeated, it is found that the stopping voltage has increased. Which of the following could explain the change between experiments?

a) The metal was changed to one with a lower work function.

b) The light intensity decreased.

c) The light frequency decreased.

d) None of the above.

electromagnetic
radiation
Eo (eV)
2.30
Element
Potassium
ammeter
evacuated tube
Sodium
2.75
Aluminum
4.28
Tungsten
4.55
voltmeter
Copper
4.65
Iron
4.70
Gold
5.10
battery

Definition Definition Phenomenon in which a substance absorbs electromagnetic radiation and electrically charged particles are emitted from or inside it.

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