What is the Principle Behind the Operation of a Laser | University of Cambridge - Edubirdie

University:
University of Cambridge
Course:
0625 IGCSE | Physics
Academic year:

2022
Views:

163

Pages:

1
Author:

jiessicawilky

Weekly Challenge Question : What is the principle behind the operation of a laser? The operation of a laser is based on a phenomenon called "stimulated emission of radiation." This process involves the interaction of atoms or molecules within a medium (such as a gas, liquid, or solid) that has been "excited" to a higher energy state. When an atom or molecule in this excited state interacts with an incoming photon of the right energy, it can be triggered to release a second photon that is identical in energy, phase, direction, and polarization to the incoming photon. This is known as stimulated emission. In a laser, this stimulated emission process is amplified through a feedback mechanism created by using mirrors placed at the ends of the medium. One mirror is fully reflective, and the other is partially reflective. Photons produced through stimulated emission bounce back and forth between the mirrors, causing further atoms or molecules in the excited state to undergo stimulated emission, generating more photons. This process leads to the rapid buildup of a coherent and intense beam of light that is emitted through the partially reflective mirror, creating the laser beam. The key components of a laser include the gain medium (the material in which stimulated emission occurs), the excitation source (which provides the energy to excite the atoms or molecules), and the optical resonator (consisting of the mirrors) that helps maintain the feedback loop. The laser's unique properties, such as high coherence, monochromaticity (single-color output), and directionality, make it highly valuable in various applications, including communication, medicine, manufacturing, and scientific research.

Related Documents

What is the Principle Behind the Operation of a Laser

What is the Principle Behind the Operation of a Laser - Page 1

of 1

Recommended Documents

Velocity of Waves on Strings Physics Notes

Velocity of Waves on Strings Physics Notes

University of Cambridge 0625 IGCSE | Physics

Lecture Note

Waves Direction Chapter 14 Sound Physics Notes

Waves Direction Chapter 14 Sound Physics Notes

University of Cambridge 0625 IGCSE | Physics

Lecture Note

13.7 Types of Waves Physics Notes

13.7 Types of Waves Physics Notes

University of Cambridge 0625 IGCSE | Physics

Lecture Note

Chapter 17 Current and Resistance

Chapter 17 Current and Resistance

University of Cambridge 0625 IGCSE | Physics

Lecture Note

IGCSE Coordinated Science: Magnetic Effect of a Current

IGCSE Coordinated Science: Magnetic Effect of a Current

University of Cambridge 0625 IGCSE | Physics

Lecture Note

Density And Relative Density

Density And Relative Density

University of Cambridge 0625 IGCSE | Physics

Lecture Note

Units And Measurement

Units And Measurement

University of Cambridge 0625 IGCSE | Physics

Lecture Note

Newton's Laws in Engineering

Newton's Laws in Engineering

University of Cambridge 0625 IGCSE | Physics

Assignment

How Does an MRI Machine use Magnetic Fields

How Does an MRI Machine use Magnetic Fields

University of Cambridge 0625 IGCSE | Physics

Assignment

What are the Practical Applications of Electromagnetic Waves

What are the Practical Applications of Electromagnetic Waves

University of Cambridge 0625 IGCSE | Physics

Assignment

Harnessing Electromagnetic Waves for High-Speed Data Transmission

Harnessing Electromagnetic Waves for High-Speed Data Transmission

University of Cambridge 0625 IGCSE | Physics

Assignment

New Documents from this Course

Newton Quantity Of Motion

Newton Quantity Of Motion

University of Cambridge 0625 IGCSE | Physics

Lecture Note

Nuclear Physics Educational Materials

Nuclear Physics Educational Materials

University of Cambridge 0625 IGCSE | Physics

Lecture Note

Wave Particles Duality

Wave Particles Duality

University of Cambridge 0625 IGCSE | Physics

Lecture Note

Energy Stored In Capacitor

Energy Stored In Capacitor

University of Cambridge 0625 IGCSE | Physics

Lecture Note

Circuit and Khircof Rule

Circuit and Khircof Rule

University of Cambridge 0625 IGCSE | Physics

Lecture Note

Magnetic Field Strength

Magnetic Field Strength

University of Cambridge 0625 IGCSE | Physics

Lecture Note

Integral of Some Particular Function

Integral of Some Particular Function

University of Cambridge 0625 IGCSE | Physics

Lecture Note

Fluids Textbook Notes

Fluids Textbook Notes

University of Cambridge 0625 IGCSE | Physics

Lecture Note

Motion Of Charged Perticles In Electric

Motion Of Charged Perticles In Electric

University of Cambridge 0625 IGCSE | Physics

Lecture Note

Faraday's Law of Electromagnetic Induction: Exploring EMF

Faraday's Law of Electromagnetic Induction: Exploring EMF

University of Cambridge 0625 IGCSE | Physics

Lecture Note

Gravitation Field Streght

Gravitation Field Streght

University of Cambridge 0625 IGCSE | Physics

Lecture Note

Energy and Intensity of Sound Waves Physics Notes

Energy and Intensity of Sound Waves Physics Notes

University of Cambridge 0625 IGCSE | Physics

Lecture Note