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Sodium surface is subjected to ultraviolet and infrared radiations separately and the stopping potential of photoelectrons determined. Then the stopping potential is
  • a)
    Equal in both cases
  • b)
    More when ultraviolet is used
  • c)
    More when infrared is used
  • d)
    May be more or less for ultraviolet depending upon its intensity as compared to the intensity of infrared light
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
Sodium surface is subjected to ultraviolet and infrared radiations sep...
Explanation:

Stopping Potential:
- Stopping potential is the minimum potential required to stop the fastest moving photoelectrons emitted from a surface when light of a certain frequency is incident on it.

Ultraviolet vs. Infrared Radiations:
- Ultraviolet radiation has higher frequency and energy compared to infrared radiation.
- Photoelectrons emitted by ultraviolet radiation have higher kinetic energy compared to those emitted by infrared radiation.
- Therefore, the stopping potential for ultraviolet radiation will be more than that for infrared radiation.

Reasoning:
- When ultraviolet radiation is used, the photoelectrons have higher kinetic energy, requiring a higher stopping potential to stop them.
- On the other hand, infrared radiation produces photoelectrons with lower kinetic energy, needing a lower stopping potential.

Answer:
- Hence, the stopping potential will be more when ultraviolet radiation is used compared to infrared radiation. Therefore, option 'B' is the correct answer.
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Sodium surface is subjected to ultraviolet and infrared radiations separately and the stopping potential of photoelectrons determined. Then the stopping potential isa)Equal in both casesb)More when ultraviolet is usedc)More when infrared is usedd)May be more or less for ultraviolet depending upon its intensity as compared to the intensity of infrared lightCorrect answer is option 'B'. Can you explain this answer?
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