If the intensity of light is doubled while keeping the frequency constant, what happens to the number of emitted electrons in the photoelectric effect?
Practice Questions
1 question
Q1
If the intensity of light is doubled while keeping the frequency constant, what happens to the number of emitted electrons in the photoelectric effect?
It doubles
It remains the same
It is halved
It becomes zero
Doubling the intensity of light increases the number of photons incident on the surface, which in turn increases the number of emitted electrons, assuming the frequency is above the threshold frequency.
Questions & Step-by-step Solutions
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Q
Q: If the intensity of light is doubled while keeping the frequency constant, what happens to the number of emitted electrons in the photoelectric effect?
Solution: Doubling the intensity of light increases the number of photons incident on the surface, which in turn increases the number of emitted electrons, assuming the frequency is above the threshold frequency.
Steps: 6
Step 1: Understand that light is made up of particles called photons.
Step 2: Know that the intensity of light refers to how many photons are hitting a surface.
Step 3: Recognize that frequency is related to the energy of each photon, but in this case, it remains constant.
Step 4: When the intensity of light is doubled, it means there are now twice as many photons hitting the surface.
Step 5: If the frequency of the light is above the threshold frequency, each photon can potentially cause the emission of an electron.
Step 6: Since there are more photons (due to increased intensity), more electrons can be emitted from the surface.
