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Photoelectric Effect

Photoelectric Effect

When light of a particular wavelength strikes a metal surface, electrons are emitted. This is called the photoelectric effect. The minimum frequency of light that can cause such emission of electrons is called the threshold frequency, which is specific to the metal. Light with a frequency lower than the threshold frequency, even if it is of high intensity, cannot initiate the emission of electrons. However, when the frequency is higher than the threshold value, the number of electrons ejected...

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Related Experiment Video

Updated: Feb 24, 2026

Wideband Optical Detector of Ultrasound for Medical Imaging Applications

Wideband Optical Detector of Ultrasound for Medical Imaging Applications

Published on: May 11, 2014

Applied physics: Optical sensing gets exceptional

Mikael C Rechtsman¹

¹Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, USA.

|August 11, 2017

Summary

No abstract available in PubMed .

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Last Updated: Feb 24, 2026

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