Electromagnetic Spectrum - Scaling Visible And Invisible Light

TECTechnics Classroom TECTechnics Overview

TECTechnics Classroom TECTechnics Overview

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

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Heat

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COHN - Natures Engineering Of The Human Body

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Painting

Electromagnetic Spectrum - Scaling Visible And Invisible Light

The *wave* nature of light presents the electromagnetic spectrum.

(a) What is a wave?

(b) Why are light waves electromagnetic?

(c) How is the electromagnetic spectrum scaled?

**The strings**:

S_{7}P_{4}A_{44} (Motion - Wave Motion).
**The math**:

Pj Problem of Interest is of type *motion* (wave-motion). The wave nature of light implies wave motion of light.

(a) A *wave* is a traveling *disturbance* that carry energy from one place to another. In other words, for a wave to occur, there must be a *disturbance* and the *disturbance* must be *propagated*. *Disturbance* is a *disequilibrium* from a *equilibrium* state. *Disturbance* can be large scale or small scale visually. For example, a person who has been tilted by a friend out of his hammock where he was resting peacefully, has been disturbed. A pebble dropped in a quiet standing lake has disturbed the water molecules of the lake. *Disturbance* is *propagated* by the energy resulting from the vibrations it initiates. In the example of the pebble dropped in the lake, water molecules are disturbed at the point where the pebble is dropped, those molecules disturb nearby molecules and so on. This movement of energy outward from a vibrating source is a *wave*.

(b) Some waves require a *medium* (the matter in which the wave is moving) in which to propagate (e.g water wave). Such waves are called *mechanical waves*.

Some waves do not require a *medium* to propagate. Instead they disturb *electric* and *magnetic* fields. Such waves are called *electromagnetic waves*. In order words, *electromagnetic waves* can travel within or without a *medium*. The source of all electromagnetic waves is *charge* that is changing speed or direction. All electromagnetic waves have the same speed. Light waves are electromagnetic waves.

(c) All waves have three fundamental characteristics:

- Amplitude (greatest distance from rest to crest of a wave).

- Wavelength (distance between two consecutive similar point on a wave).

- Frequency (number of waves that pass a given point in a given amount of time usually in a second).

The various types of light waves differ in wavelengths and as a result in frequency also. The arrangement of light waves according to increasing frequency (decreasing wavelength) constitute the scaling of light. This arrangement is called the *electromagnetic spectrum* (figure 21.7).
*Visible light* is that part of the electromagnetic spectrum that the human eye can perceive naturally (i.e. unaided by technology other than normal vision lenses). In order words, the range of frequencies of visible light are within the range of frequencies the unaided human eye can perceive.
*Invisible Light* is that part of the electromagnetic spectrum that the human eye cannot perceive naturally (i.e. natural eyes need technological help). In order words, the range of frequencies of invisible light are not within the range of frequencies the unaided human eye can perceive.

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