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Photoelectric Effect UPSC NOTE

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  Einstein won the Nobel Prize for explaining the photoelectric effect , not for his work on gravity and spacetime. Photoelectric Effect: ...

 

  • Einstein won the Nobel Prize for explaining the photoelectric effect, not for his work on gravity and spacetime.

  • Photoelectric Effect: Early 20th-century physicists discovered that when metal is exposed to light, it emits electrons

  • The kinetic energy of these electrons depended on the light's frequency, not intensity.

  • In 1905, Einstein proposed that light consists of particles called photons

  • When a photon has enough energy, it can eject an electron from the metal.

  • The photoelectric effect is fundamental to solar power. 

  • Solar cells use photons to eject electrons and generate electric current.

  • To study the photoelectric effect, physicists developed ultrashort light pulses

  • Recent Nobel Prize winners created attosecond pulses (10^-18 seconds) for studying faster-moving electrons.

  • Researchers use attosecond pulses to study photoionisation delays and other electronic behaviors at extremely short timescales.

Applications: 

  • Understanding photoemission delays and electron correlation helps in imaging proteins and viruses and developing next-generation electronics.

  • Future Implications: Basic research in this area promises practical applications and a deeper understanding of biochemical reactions and material properties.

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Learnerz IAS | Concept oriented UPSC Classes in Malayalam: Photoelectric Effect UPSC NOTE
Photoelectric Effect UPSC NOTE
Learnerz IAS | Concept oriented UPSC Classes in Malayalam
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