If the intensity of light is doubled while keeping the frequency constant, what happens to the number of emitted electrons?
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?
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
1 item
Q
Q: If the intensity of light is doubled while keeping the frequency constant, what happens to the number of emitted electrons?
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: 5
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 if the intensity of light is doubled, it means there are now twice as many photons hitting the surface.
Step 4: Remember that each photon can potentially cause the emission of one electron from the surface, provided the frequency of the light is high enough.
Step 5: Since the frequency is kept constant and is above the threshold frequency, doubling the number of photons will lead to doubling the number of emitted electrons.
