alleryHowever intense the light, no emission occurs below the:
AWork done by hand
BThreshold frequency
CSaturation current
DStopping potential
Answer & Solution
Correct answer: B. Threshold frequency
1. Intensity only changes how many photons arrive.
2. Each individual photon is still too weak to free an electron.
3. So nothing happens below the threshold frequency.
4. The answer is threshold frequency.
_Source: syllabus Physics, Ch 11 'Dual Nature of Radiation and Matter'_
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