Light Amplification By Stimulated Emission Of Radiation
TECTechnics Classroom   TECTechnics Overview

Expressions Of Pj Problems
Light Amplification By Stimulated Emission Of Radiation

Light Amplification By Stimulated Emission Of Radiation

Its Tee again, a sharp 7 year old. "Come here Tee". Called Tee's mom. "Explain to me what is meant by monochromatic light, coherent light and LASER". Said Tee's mom. "Just excitation mom, just excitation". Said Tee.

Describe Tee's explanation.

The strings: S7P3A32 (Force - Push).

The math:
Pj Problem of Interest is of type force (push). When an electron absorbs energy it is excited and pushed to a higher energy level. When it gives up the energy, it is pushed back to its original energy level.


A monochromatic light is a light of a single wavelength.
Light of the same wavelength that travel in step (crests of light wave travel next to one another and troughs travel next to one another) is coherent light.

A LASER is the acronym for Light Amplification by Stimulated Emission of Radiation. It is a device that produces coherent light.
Consider figure 22.14:
When an electron of a normal atom absorbs a photon of energy, it is pushed to a higher energy level and the atom becomes excited. When the electron gives up the photon-energy, it returns to its energy level prior to the excitation and the atom returns to its normalcy. It does happen that if an already excited atom is hit by a photon of energy, the atom does not absorb the photon-energy. Instead it releases the photon-energy it had already absorbed priorily. Consequently, there exist two coherent photons in the space. If these two coherent photons hit two other excited atoms, there will be four coherent photons in the space. If these four coherent photons hit four other excited atoms, there will be eight coherent photons in the space. This process by which an arithmetic series of coherent photons result from the interactions of photon-energies (radiation) and excited atoms is called stimulated emission of radiation. The arithmetic progression of coherent photons is light amplification.

A laser consists of a tube containing substances (gases, liquid or solid) whose light properties will cause the desired light wavelength to be produced. A mirror is placed at one end of the tube for total reflection and a partial mirror is placed at the other end to allow some light through it. Both mirrors allow the photons traveling down the tube to bounce back and forth within the tube in order to maximize collisions of photons and excited atoms. As the beam is amplified in the tube, a tiny percentage of its coherent light passes through the partial mirror and is manifested as the laser beam.


The point . is a mathematical abstraction. It has negligible size and a great sense of position. Consequently, it is front and center in abstract existential reasoning.
Derivation Of The Area Of A Circle, A Sector Of A Circle And A Circular Ring
Derivation Of The Area Of A Trapezoid, A Rectangle And A Triangle
Derivation Of The Area Of An Ellipse
Derivation Of Volume Of A Cylinder
Derivation Of Volume Of A Sphere
Derivation Of Volume Of A Cone
Derivation Of Volume Of A Torus
Derivation Of Volume Of A Paraboloid
Volume Obtained By Revolving The Curve y = x2 About The X Axis
Single Variable Functions
Absolute Value Functions
Real Numbers
Vector Spaces
Equation Of The Ascent Path Of An Airplane
Calculating Capacity Of A Video Adapter Board Memory
Probability Density Functions
Boolean Algebra - Logic Functions
Ordinary Differential Equations (ODEs)
Infinite Sequences And Series
Introduction To Group Theory
Advanced Calculus - Partial Derivatives
Advanced Calculus - General Charateristics Of Partial Differential Equations
Advanced Calculus - Jacobians
Advanced Calculus - Solving PDEs By The Method Of Separation Of Variables
Advanced Calculus - Fourier Series
Advanced Calculus - Multiple Integrals
Production Schedule That Maximizes Profit Given Constraint Equation
Separation Of Variables As Solution Method For Homogeneous Heat Flow Equation
Newton And Fourier Cooling Laws Applied To Heat Flow Boundary Conditions
Fourier Series
Derivation Of Heat Equation For A One-Dimensional Heat Flow

The Universe is composed of matter and radiant energy. Matter is any kind of mass-energy that moves with velocities less than the velocity of light. Radiant energy is any kind of mass-energy that moves with the velocity of light.
Periodic Table
Composition And Structure Of Matter
How Matter Gets Composed
How Matter Gets Composed (2)
Molecular Structure Of Matter
Molecular Shapes: Bond Length, Bond Angle
Molecular Shapes: Valence Shell Electron Pair Repulsion
Molecular Shapes: Orbital Hybridization
Molecular Shapes: Sigma Bonds Pi Bonds
Molecular Shapes: Non ABn Molecules
Molecular Orbital Theory
More Pj Problem Strings

What is Time?
St Augustine On Time
Bergson On Time
Heidegger On Time
Kant On Time
Sagay On Time
What is Space?
Newton On Space
Space Governance
Imperfect Leaders
Essence Of Mathematics
Toolness Of Mathematics
The Number Line
The Windflower Saga
Who Am I?
Primordial Equilibrium
Primordial Care
Force Of Being

Blessed are they that have not seen, and yet have believed. John 20:29

TECTechnic Logo, Kimberlee J. Benart | © 2000-2021 | All rights reserved | Founder and Site Programmer, Peter O. Sagay.