Photoelectric Effect (Cesium)

Cs + hν → Cs+ + e−

अवलोकन

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.

प्रतिभागी

भूमिका पदार्थ गुणांक अवस्था
अभिकारक Cesium Cs 1 (s)

रोजमर्रा का उदाहरण

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

औद्योगिक महत्व

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

गुण

प्रकार
Photochemical
प्रतिवर्ती
नहीं
ऊर्जा
ऊष्माशोषी

संबंधित अभिक्रियाएँ

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).