What is photoelectric effect
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Photoelectric effect:
✔️It is the phenomenon of emission of electrons from the surface of certain photosynthesis materials when light waves with particular frequency and sufficient energy fall on them.
✔️Consider a photon of light frequency ν incident on a photosensitive metal surface. The energy of the photon (= hν) can be used in two ways:
1️⃣ To liberate the electron from the metal surface (Φ= Work function)
2️⃣ The rest of the energy of the photon is used in imparting the maximum kinetic energy kmax to the emitted photoelectrons.
☺️It was first observed by Heinrich Hertz. Visible light produces photoelectric effect on alkali metals.
✔️It is the phenomenon of emission of electrons from the surface of certain photosynthesis materials when light waves with particular frequency and sufficient energy fall on them.
✔️Consider a photon of light frequency ν incident on a photosensitive metal surface. The energy of the photon (= hν) can be used in two ways:
1️⃣ To liberate the electron from the metal surface (Φ= Work function)
2️⃣ The rest of the energy of the photon is used in imparting the maximum kinetic energy kmax to the emitted photoelectrons.
☺️It was first observed by Heinrich Hertz. Visible light produces photoelectric effect on alkali metals.
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➡PHOTO ELECTRIC EFFECT : it deals with the ejection of electrons from the surface of a neutral gaseous atom when light of suitable frequencies strike on its surface .
➡It is Inversely proportional to the Ionization Enthalp y.
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⏪Observations of photo electric Effect :
➡The electron are ejected from the surface as soon as light strikes on its surface .
➡for every metal , a minimum frequency called Thresh Hold frequency is needed to eject the electrons .
➡The energy of ejected electrons is directly proportional to the energy of incident radiations.
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➡PHOTO ELECTRIC EFFECT : it deals with the ejection of electrons from the surface of a neutral gaseous atom when light of suitable frequencies strike on its surface .
➡It is Inversely proportional to the Ionization Enthalp y.
-------------------------------------------------------------------------------------------------------
⏪Observations of photo electric Effect :
➡The electron are ejected from the surface as soon as light strikes on its surface .
➡for every metal , a minimum frequency called Thresh Hold frequency is needed to eject the electrons .
➡The energy of ejected electrons is directly proportional to the energy of incident radiations.
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thanks
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