Photoelectric Effect (Cesium)

Cs + hν → Cs+ + e−

개요

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.

참여 물질

역할 물질 계수 상태
반응물 Cesium Cs 1 (s)

일상 속 예시

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

산업적 중요성

광전 효과는 광전자 증배관, 태양 전지, 광검출기, 전자 분광법(XPS)의 기반입니다.

성질

유형
Photochemical
가역 반응
아니오
에너지
흡열

관련 반응

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).