Practice portal › Dual Nature of Matter and Radiation › Conceptual and Statement Questions on the Photoelectric Effect
Asked in GSEB Board July 2016 · Conceptual points of the photoelectric effect
Given: light falls on a photosensitive surface and electrons are emitted.
Idea: Einstein's photoelectric equation 1/2mvₘₐₓ² = h u - φ₀.
The work function φ₀ is the property of the surface.
The only property of the light that appears is its frequency u, through the photon energy h u.
So the (maximum) speed of the photoelectrons depends on the surface and on the frequency of the incident light; intensity, polarization and exposure time do not enter.
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