What is L.A.S.E.R light and how is it different compared to regular light???

Question

Why do these photons travel in a more direct path??? and if possible,who was L.A.S.E.R lights creator???...thank you for the detailed answer

Answer 1

http://science.howstuffworks.com/laser4.htm
is a great website for tech questions and
Wikipedia is an old standby.
I've included info from both sites below:

Laser light is very different from normal light. Laser light has the following properties:
The light released is monochromatic. It contains one specific wavelength of light (one specific color). The wavelength of light is determined by the amount of energy released when the electron drops to a lower orbit.
The light released is coherent. It is “organized” -- each photon moves in step with the others. This means that all of the photons have wave fronts that launch in unison.
The light is very directional. A laser light has a very tight beam and is very strong and concentrated. A flashlight, on the other hand, releases light in many directions, and the light is very weak and diffuse.
To make these three properties occur takes something called stimulated emission. This does not occur in your ordinary flashlight -- in a flashlight, all of the atoms release their photons randomly. In stimulated emission, photon emission is organized.

The photon that any atom releases has a certain wavelength that is dependent on the energy difference between the excited state and the ground state. If this photon (possessing a certain energy and phase) should encounter another atom that has an electron in the same excited state, stimulated emission can occur. The first photon can stimulate or induce atomic emission such that the subsequent emitted photon (from the second atom) vibrates with the same frequency and direction as the incoming photon.

The other key to a laser is a pair of mirrors, one at each end of the lasing medium. Photons, with a very specific wavelength and phase, reflect off the mirrors to travel back and forth through the lasing medium. In the process, they stimulate other electrons to make the downward energy jump and can cause the emission of more photons of the same wavelength and phase. A cascade effect occurs, and soon we have propagated many, many photons of the same wavelength and phase. The mirror at one end of the laser is "half-silvered," meaning it reflects some light and lets some light through. The light that makes it through is the laser light.


A laser (from the acronym Light Amplification by Stimulated Emission of Radiation) is an optical source that emits photons in a coherent beam. The back-formed verb to lase means "to produce laser light" or possibly "to apply laser light to".
Laser light is typically near-monochromatic, i.e., consisting of a single wavelength or color, and emitted in a narrow beam. This is in contrast to common light sources, such as the incandescent light bulb, which emit incoherent photons in almost all directions, usually over a wide spectrum of wavelengths.

Answer 2

Laser is Light Amplification by Stimulation Emit ion of Radiation

So you can find the laser mean
You have to study the physic of laser
To make the laser we pomp the electron in high level of energy
when some photons transient inside the electrons some electrons come back to base level and make the photon as same as transient photon
so these photons are in same line so in laser we have some photons in one line.
the theory of laser is writ en by Albert Einstein but for the first time the laser is created by one team in Germany that prof. Javan was in that team
but I forgot the leader of team.

Answer 3

High Performance Tactical Flashlight : http://FlashLight.uzaev.com/?WBQH

Answer 4

laser=LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION......laser is a monochromatic beam of light......and "normal" light is polychromatic(multi coloured vibgyor)......and as the name suggests it is RADIATION......so it has wave nature not particle nature....studied the dual nature of matter?????thats y its velocity(velocity not speed) changes!!!!