In a photoelectric experiment, if the frequency of light is just above the threshold frequency, what can be said about the emitted electrons?
Practice Questions
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Q1
In a photoelectric experiment, if the frequency of light is just above the threshold frequency, what can be said about the emitted electrons?
They have maximum kinetic energy
They are emitted with zero kinetic energy
They are emitted with high kinetic energy
No electrons are emitted
If the frequency of light is just above the threshold frequency, the emitted electrons will have zero kinetic energy, as all the energy is used to overcome the work function.
Questions & Step-by-step Solutions
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Q
Q: In a photoelectric experiment, if the frequency of light is just above the threshold frequency, what can be said about the emitted electrons?
Solution: If the frequency of light is just above the threshold frequency, the emitted electrons will have zero kinetic energy, as all the energy is used to overcome the work function.
Steps: 6
Step 1: Understand the threshold frequency. This is the minimum frequency of light needed to release electrons from a material.
Step 2: Recognize that when light of frequency just above the threshold frequency hits the material, it can release electrons.
Step 3: Know that the energy of the incoming light is used to overcome the work function, which is the energy needed to release an electron.
Step 4: If the frequency of light is just above the threshold frequency, it means the energy provided by the light is just enough to overcome the work function.
Step 5: Since all the energy from the light is used to overcome the work function, the emitted electrons will have no extra energy left over.
Step 6: Therefore, the emitted electrons will have zero kinetic energy.
