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The mysteries of technology. Lasers. By: Garrett Sakomizu. Introduction to the World of Lasers.

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The mysteries of technology


By: Garrett Sakomizu

Introduction to the world of lasers

Introduction to the World of Lasers

Imagine yourself in a supermarket and you are ready to go pay for your items. You go home and watch a movie in your DVD player. You would have needed a laser for both of those tasks. Lasers are important tool in our everyday lives and is applied to more and more everyday things as technology becomes more and more advanced. In this presentation I have given information on lasers in a couple of ways: science about lasers, the parts of the laser, how a laser works, lasers in our modern world, and lasers in movies and myths.

I hope that you, as the audience will enjoy my presentation.

The science behind lasers

The Science Behind Lasers

The word LASER is an acronym for “Light Amplification by Stimulated Emission of Radiation.” Lasers are very unique compared to flashlights as you can see in this picture:

One Color

Multiple Colors

In these pictures, the flashlight’s wavelengths are different because the flashlight emits white light

(which is composed of red, orange, yellow, green, blue, indigo, and violet) which have different

wavelengths. In a laser, the wavelengths are the same, which, in turn, makes a laser one color.

This is why lasers are coherent; they are all one color.


Amplification by


Emission of


What are the parts of a laser and how do they work

What Are The Parts of a Laser and How Do They Work?

As this presentation has showed you, lasers are powerful beams of coherent light. So, a laser must have something to do with heat or electricity. The diagram below shows the parts of a laser and how they work:

6. Mirrors at

either end bounce

the photons

back and forth

7. The mirror

that is not

entirely reflective

allows some of

the light to

leave the tube

as a tight beam

of laser light

3. Electrons absorb

the energy from

the flashtubes’










in the



2. Electricity

is produced

5. The photon

bangs into

another electron,

causing it to

release another


4. Electrons

release the

energy in

the form

of a photon

Lasers in our modern world

Lasers in our Modern World

Like this presentation has said before, lasers are used all over the place in modern technology. The below photographs show that lasers are used in/for:

Bar Code Scanning Devices

Playing DVD’s and CD’s

…and so

much more…

Welding (cutting through metal)

An eye treatment such as LASIK

Lasers in movies and in myths

Lasers in movies and in myths

In the last scene of the movie Real Genius Jerry’s

house is destroyed when an overhead plane fires

a powerful laser at an enormous bag of popcorn,

cooking it, and crumpling the house to the ground.

Here is a photograph of that scene:

Lasers have also been used in movies for fighting.

Consider the movies Star Wars and Star Trek. In

Star Wars, lasers are used in lightsabers and

blasters. Here is a photo of a lightsaber:

Lasers have been used in some movies and myths. Here are three examples:

Lasers are also used in Star Trek

vehicles weapons such as in phasers.

The myth is that a strong enough laser can cook so

much popcorn that it can break through windows

and doors and crumple the house to the ground.

The end

The End


I hope you enjoyed my presentation.

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