AIIMS 2019 Physics Wave-Particle Duality Assertion Reason Question
Assertion: Photoelectric effect demonstrates the wave nature of light. Reason: The number of photoelectrons is proportional to the frequency of light.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Correct Answer
Detailed Explanation
The assertion is false because the photoelectric effect actually demonstrates the particle nature of light, as it involves the emission of electrons from a material when it absorbs photons with sufficient energy. The reason is also false; while the number of emitted photoelectrons is proportional to the intensity of light, it is the frequency of light that determines whether photoemission occurs, with higher frequencies (above a certain threshold) leading to the emission of electrons. Other options are incorrect because they either misinterpret the relationship between assertion and reason or incorrectly assert their truthfulness.
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