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If in a photoelectric experiment, the wavelength of incident radiation is reduced from 6000Å to 4000Å, then
- a)Stopping potential will decrease
- b)Stopping potential will increase
- c)kinetic energy of emitted electrons will decrease
- d)The value of work function will decrease
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
If in a photoelectric experiment, the wavelength of incident radiation...
Ans : (B)
ϕ=hcλ−eV∘ϕ= work function of a particular metal will remain constant
If λ = incident radiation wavelength is increased,
V∘ = stopping potential also has to increase to keep ϕ constant.
Most Upvoted Answer
If in a photoelectric experiment, the wavelength of incident radiation...
Explanation:
Photoelectric effect is the phenomenon of emission of electrons from a metal surface when it is exposed to light of certain frequencies or wavelengths.
The stopping potential is the minimum potential difference required to stop the emission of photoelectrons from the metal surface. It is directly proportional to the frequency (or inversely proportional to the wavelength) of the incident radiation.
When the wavelength of incident radiation is reduced from 6000 to 4000, it means that the frequency of the radiation has increased. This is because the speed of light is constant, and frequency and wavelength are inversely proportional to each other.
Thus, the effect of reducing the wavelength can be understood as follows:
- The frequency of incident radiation increases
- The energy of incident photons increases (since energy is directly proportional to frequency)
- The kinetic energy of emitted electrons increases (since kinetic energy is equal to the difference between the energy of incident photons and the work function of the metal)
- The stopping potential required to stop the emission of photoelectrons increases (since it is directly proportional to the energy of incident photons)
Therefore, the correct option is (b) stopping potential will increase.
Photoelectric effect is the phenomenon of emission of electrons from a metal surface when it is exposed to light of certain frequencies or wavelengths.
The stopping potential is the minimum potential difference required to stop the emission of photoelectrons from the metal surface. It is directly proportional to the frequency (or inversely proportional to the wavelength) of the incident radiation.
When the wavelength of incident radiation is reduced from 6000 to 4000, it means that the frequency of the radiation has increased. This is because the speed of light is constant, and frequency and wavelength are inversely proportional to each other.
Thus, the effect of reducing the wavelength can be understood as follows:
- The frequency of incident radiation increases
- The energy of incident photons increases (since energy is directly proportional to frequency)
- The kinetic energy of emitted electrons increases (since kinetic energy is equal to the difference between the energy of incident photons and the work function of the metal)
- The stopping potential required to stop the emission of photoelectrons increases (since it is directly proportional to the energy of incident photons)
Therefore, the correct option is (b) stopping potential will increase.
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If in a photoelectric experiment, the wavelength of incident radiation is reduced from 6000Å to 4000Å, thena) Stopping potential will decrease b) Stopping potential will increase c) kinetic energy of emitted electrons will decrease d) The value of work function will decrease Correct answer is option 'B'. Can you explain this answer?
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