alleryPhotoelectric emission begins after a time lag that is:
AAround one day
BClose to a week
CEffectively none
DAbout one hour
Answer & Solution
Correct answer: C. Effectively none
1. Wave theory predicted a long wait for weak light.
2. Experiment found emission starting at once.
3. The process is instantaneous.
4. So the answer is effectively none.
_Source: syllabus Physics, Ch 11 'Dual Nature of Radiation and Matter'_
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