LAZERRRRRRR

BY:

Joanna

Scientific research

In the 60 years or so since lasers were developed, they've become smaller, more precise, and more powerful. At Lawrence Livermore National Laboratory in California, scientists have developed the world's most powerful laser, the National Ignition Facility (NIF), for nuclear research. Costing $1.2 billion, it's housed in a 10-story building occupying an area as big as three football fields, uses 192 separate laser beams that deliver 60 times more energy than any other laser, and it can generate temperatures of up to 100,000,000 degrees!

The development of laser

who invented lasers

In the 60 years or so since lasers were developed, they've become smaller, more precise, and more powerful.

At Lawrence Livermore National Laboratory in California, scientists have developed the world's most powerful laser, the National Ignition Facility, for nuclear research.

Lasers can even...

Lasers evolved from masers (Microwaves amplification by Stimulated Emission of Radiation), which are similar but produce microwaves and radio waves instead of visible light.

Masers were invented in the 1950s by Charles Townes and Arthur Schawlow. In 1957, one of Townes' graduate students, Gordon Gould, sketched in his lab notebook an idea for how a visible light version of the maser could work. He used the word "laser" that we've used ever since.

correct eye problems such as short sight.

lasers can cut...

lasers produce such intense and precisely focused energy that they can cut through metals, ceramics, gems, plastics, and cloths.

what is a laser?

how to get a laser

To get a laser you need to get excited atoms. Excited atoms emit photons. This in turn stimulates other atoms to emit photons.

• A laser is a special source of light.
• It's only one pure color.
• You can't break laser light into other colors.

Laser stands for Light Amplification by Stimulated Emission of Radiation

What laser stands for

Lasers can also send information through long threads of glass called optical fibers.

A single laser can send thousands of phone conversations through a fiber at the same time.

lasers can be used for communication

lasers can focus

Lasers can be focused to a very small spot.

They can shine for long distances without spreading out very much (unlike flashlights, which spreads out a lot.)

Laser can carry information

Bibliography

lasers and eyes

Lower-power laser systems can be used to send and pick up information. For example, the product code scanner in a grocery store uses a laser, lenses, rotating mirrors, and a computer to read bar codes from products.

http://optics.synopsys.com/learn/kids/optics-kids-about-lasers.html

http://www.planet-science.com/categories/over-11s/technology/2012/01/what-is-a-laser.aspx

During the LASIK procedure, a specially trained eye surgeon first creates a precise, thin hinged corneal flap using a microkeratome. The surgeon then pulls back the flap to expose the underlying corneal tissue, and then the excimer laser ablates (reshapes) the cornea in a unique pre-specified pattern for each patient.

http://www.explainthatstuff.com/lasers.html

there is a LASIK surgery to help your eyes

lasers can read information

The tiny laser in a CD player reads even tinier bumps and holes that record the music like Morse Code.

Laser can make holograms

Lasers can also make 3-D pictures called holograms.

some engineers are working on moving holograms, so someday we may have amazing 3-D TV pictures.

The End!

LASERS