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As the intensity of incident light increases [1999]
- a)photoelectric current increases
- b)K. E. of emitted photelectrons increases
- c)photoelectric current decreases
- d)K.E. of emitted photoelectrons decreases
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
As the intensity of incident light increases [1999]a)photoelectric c...
K.E. of electrons emitted depends upon the
frequency of incident rays rather than the
intensity. While number of photo electrons
emitted depends upon intensity of radiation.
frequency of incident rays rather than the
intensity. While number of photo electrons
emitted depends upon intensity of radiation.
Most Upvoted Answer
As the intensity of incident light increases [1999]a)photoelectric c...
If the intensity of light of a given frequency is increased, then the number of photons striking the surface per second will increase in the same ratio. This increased number of photons strikes more electrons of metals and hence number of photoelectrons emitted through the surface increase and
hence photoelectric current increases.
hence photoelectric current increases.
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Community Answer
As the intensity of incident light increases [1999]a)photoelectric c...
Understanding the Photoelectric Effect
The photoelectric effect is a phenomenon in which electrons are emitted from a material when it absorbs light energy. The key aspects of this phenomenon relate to light intensity and the behavior of emitted electrons.
The Effect of Light Intensity
When the intensity of incident light increases, the following occurs:
Kinetic Energy of Emitted Electrons
It's important to note that while the current increases with intensity, the kinetic energy (K.E.) of the emitted electrons is influenced by the frequency of the light, not the intensity.
Conclusion
To summarize, as the intensity of incident light increases:
Therefore, the correct answer is indeed option 'A' – the photoelectric current increases with increasing light intensity.
The photoelectric effect is a phenomenon in which electrons are emitted from a material when it absorbs light energy. The key aspects of this phenomenon relate to light intensity and the behavior of emitted electrons.
The Effect of Light Intensity
When the intensity of incident light increases, the following occurs:
- Photoelectric Current Increases: As the intensity of light increases, more photons strike the surface of the material. This leads to a greater number of electrons being emitted, thereby increasing the photoelectric current. The current is directly proportional to the number of emitted electrons.
Kinetic Energy of Emitted Electrons
It's important to note that while the current increases with intensity, the kinetic energy (K.E.) of the emitted electrons is influenced by the frequency of the light, not the intensity.
- Constant K.E. with Increased Intensity: The kinetic energy of emitted photoelectrons depends on the energy of individual photons, which is determined by their frequency (E = hf). Thus, even with increased intensity, if the frequency remains constant, the K.E. of the emitted electrons does not change.
Conclusion
To summarize, as the intensity of incident light increases:
- The photoelectric current increases due to a higher number of emitted electrons.
- The kinetic energy of the emitted photoelectrons remains constant if the frequency of light does not change.
Therefore, the correct answer is indeed option 'A' – the photoelectric current increases with increasing light intensity.
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