Chemistry - Atomic Structure Question with Solution | TestHub
ChemistryAtomic StructurePhotoelectric EffectMedium2 minQB
ChemistryMediumsingle choice
Consider the following statements about the photoelectric effect.
(I) The maximum kinetic energy of the photoelectrons does not depend on the intensity of the light.
(II) For light above the threshold frequency, the number of photoelectrons emitted per second is proportional to the intensity.
(III) If the intensity is made large enough, emission occurs even for light below the threshold frequency.
Which of the statements is/are correct?
Options:
Answer:
A
Solution:
(I) K.E.max = hν - φ depends on frequency only. True.
(II) Each photon ejects at most one electron, so the emission rate follows the number of photons, i.e. the intensity. True.
(III) Below the threshold frequency no single photon has enough energy, and intensity does not change that. False.
Answer: (A).
Stream:JEESubject:ChemistryTopic:Atomic StructureSubtopic:Photoelectric Effect
⏱ 2mℹ️ Source: QB
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