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Quantum Physics
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Total cards: 4•Content version: v4•Public deck•Updated: 8/1/2026
Card preview (4)
#1
Front (Question)
What is the photoelectric effect?
Back (Answer)
Emission of electrons from the surface of a metal when photons are incident on the metal.
#2
Front (Question)
What is 1 electronvolt?
Back (Answer)
The energy required to move an electron through a p.d of 1V.
#3
Front (Question)
Define work function.
Back (Answer)
The minimum energy required to release an electron from the surface of a metal.
#4
Front (Question)
Explain why a pattern is produced when electrons pass through graphite.
Back (Answer)
Electrons behave as a wave and can diffract. When the wavelength of electrons is similar to the gap of the graphite, diffraction takes place. The regular arrangement of atoms serves as a grating that causes interference of wavelengths to produce a pattern.