Photoelectric Effect (Cesium)

Cs + hν → Cs+ + e−

Обзор

Photons with energy exceeding the work function of cesium (2.1 eV, wavelength < 590 nm) eject electrons from the metal surface. Cesium has the lowest work function of any stable element, making it the most photosensitive metal. Einstein's explanation of this effect in 1905 established the quantum nature of light and won him the Nobel Prize.

Участники

Роль Вещество Коэффициент Состояние
Реагент Cesium Cs 1 (s)

Пример из жизни

Automatic doors use photoelectric sensors that detect when a person blocks a light beam, triggering the door to open.

Промышленное значение

The photoelectric effect is fundamental to photomultiplier tubes, solar cells, photodetectors, and electron spectroscopy (XPS).

Свойства

Тип
Photochemical
Обратимая
Нет
Энергия
Эндотермическая

Связанные реакции

Photochemical Smog Formation (NO₂ Photolysis) Photochromism of Spiropyran Chlorophyll Fluorescence Photodegradation of Methylene Blue by TiO₂ Photodissociation of Chlorine Gas Silver Bromide Photodecomposition Cis-Trans Isomerization of Retinal Photosynthesis Ozone Formation by UV Light Dye-Sensitized Solar Cell (Grätzel Cell)

Frequently Asked Questions

What is the equation for Photoelectric Effect (Cesium)?
The balanced equation is: Cs + hν → Cs⁺ + e⁻.
What type of reaction is Photoelectric Effect (Cesium)?
Photoelectric Effect (Cesium) is a photochemical reaction.
Is Photoelectric Effect (Cesium) exothermic or endothermic?
Photoelectric Effect (Cesium) is endothermic (absorbs energy).