Question:
Which one of the following statements is INCORRECT regarding the photoelectric effect?
Which one of the following statements is INCORRECT regarding the photoelectric effect?
Show Hint
Intensity affects the number of electrons; Frequency affects the energy of electrons.
Updated On: Apr 28, 2026
- Threshold frequency is different for different metals
- The same metal gives same response to light of different wavelengths
- The emission of photoelectrons is an instantaneous process
- Above threshold frequency, the number of photoelectrons is proportional to intensity
- Maximum K.E. is independent of the intensity of incident radiation
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The Correct Option is B
Solution and Explanation
Step 1: Concept
The photoelectric effect depends heavily on the frequency (or wavelength) of incident light.
Step 2: Analysis
According to Einstein's equation, $K.E. = hf - \phi$. Since $f = c/\lambda$, different wavelengths provide different energies.
Step 3: Conclusion
Statement (B) is incorrect because a metal's response (like K.E. of electrons) changes with the wavelength of incident light. Final Answer: (B)
The photoelectric effect depends heavily on the frequency (or wavelength) of incident light.
Step 2: Analysis
According to Einstein's equation, $K.E. = hf - \phi$. Since $f = c/\lambda$, different wavelengths provide different energies.
Step 3: Conclusion
Statement (B) is incorrect because a metal's response (like K.E. of electrons) changes with the wavelength of incident light. Final Answer: (B)
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