Practice question · Multiple choice
Light intensity measures photon count rather than individual photon energy. What does this distinction imply for increasing the brightness of a beam that already ejects photoelectrons?
Hints
- What physical property dictates the kinetic energy of a single liberated electron?
- Does changing the quantity of incoming photons alter the energy delivered by any individual one?
Show the answer
D. More electrons are ejected with unchanged maximum speed
Why
Confusing total beam energy with individual photon energy leads to expecting faster electrons or shifted thresholds. In single-photon interactions, multiplying photon arrivals raises only the rate of collision events, leaving the energy balance per ejected electron untouched.
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