In the photoelectric effect, what happens to the kinetic energy of emitted electrons when the frequency of incident light is increased? (2021)
Practice Questions
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Q1
In the photoelectric effect, what happens to the kinetic energy of emitted electrons when the frequency of incident light is increased? (2021)
Increases
Decreases
Remains constant
Becomes zero
According to the photoelectric effect, the kinetic energy of emitted electrons increases with the frequency of the incident light, provided the frequency is above the threshold frequency.
Questions & Step-by-step Solutions
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Q
Q: In the photoelectric effect, what happens to the kinetic energy of emitted electrons when the frequency of incident light is increased? (2021)
Solution: According to the photoelectric effect, the kinetic energy of emitted electrons increases with the frequency of the incident light, provided the frequency is above the threshold frequency.
Steps: 7
Step 1: Understand the photoelectric effect. This is when light hits a material and causes it to emit electrons.
Step 2: Know that light has a frequency, which is how often the light waves pass a point in one second.
Step 3: Learn about the threshold frequency. This is the minimum frequency of light needed to emit electrons from the material.
Step 4: If the frequency of the incident light is below the threshold frequency, no electrons are emitted.
Step 5: If the frequency of the incident light is above the threshold frequency, electrons are emitted.
Step 6: Understand that as the frequency of the incident light increases (above the threshold), the kinetic energy of the emitted electrons also increases.
Step 7: Remember that kinetic energy is the energy of motion, so higher frequency light gives the electrons more energy.
