Expressions Of Pj Problems

Pj Problems - Overview

Celestial Stars

The Number Line

Geometries

7 Spaces Of Interest - Overview

Triadic Unit Mesh

Creation

The Atom

Survival

Energy

Light

Heat

Sound

Music

Language

Stories

Work

States Of Matter

Buoyancy

Nuclear Reactions

Molecular Shapes

Electron Configurations

Chemical Bonds

Energy Conversion

Chemical Reactions

Electromagnetism

Continuity

Growth

Human-cells

Proteins

Nucleic Acids

COHN - Natures Engineering Of The Human Body

The Human-Body Systems

Vision

Walking

Behaviors

Sensors Sensings

Beauty

Faith, Love, Charity

Photosynthesis

Weather

Systems

Algorithms

Tools

Networks

Search

Differential Calculus

Antiderivative

Integral Calculus

Economies

Inflation

Markets

Money Supply

Painting

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**:
S_{7}P_{3}A_{32} (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.

Math

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 = x^{2} About The X Axis

Single Variable Functions

Absolute Value Functions

Conics

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

Homogenizing-Non-Homogeneous-Time-Varying-IBVP-Boundary-Condition

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