Photoelectric Effect (Cesium)

Cs + hν → Cs+ + e

ภาพรวม

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.

ผู้เข้าร่วม

บทบาท สาร สัมประสิทธิ์ สถานะ
สารตั้งต้น Cesium Cs 1 (s)

ตัวอย่างในชีวิตประจำวัน

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

ความสำคัญทางอุตสาหกรรม

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

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).