The function of laser cut (2)

(3)Very pure colors
The color of light is determined by the wavelength of light ( or frequency ) .
Certain certain color corresponding to a wavelength . The wavelength
distribution of sunlight is between about 0.76 micrometers to 0.4 micrometers ,
and the corresponding color from red to purple colors of 7 , so the color of
sunlight alone . Emitting a single color light source called a monochromatic
light source , which emits a single wavelength of light . Such as krypton
lamps, helium , neon , hydrogen , etc. are monochromatic light source , only
one color of light emitted.

Although the wavelength of the light single monochromatic light source , but
there is still a certain distribution . As only emit red neon , color is very
good , as the color of the crown, there is still scope 0.00001 nanometer
wavelength distribution , so the red neon issued , if carefully identify which
still contains dozens of red . Thus , the wavelength distribution of the
optical radiation , the narrower the interval , the better the color . Optical
laser output wavelength distribution range is very narrow , so that the colors
very pure . To output red helium-neon laser , for example, the wavelength
distribution of its light can be as narrow as 2 × 10 ^ -9 nm, is ten
thousandths red wavelength distribution of light emitted by krypton . Thus, the
laser is far more than any kind of monochromatic monochromatic light source.


(4)Maximum energy density
Hv is the photon energy is calculated by E =, where h is Planck's constant , v
is the frequency . It can be seen , the higher the frequency , the higher the
energy . The laser frequency range 3.846 * 10 ^ (14) Hz to 7.89510 (14) Hz
electromagnetic spectrum can be roughly divided into: (1 ) radio waves -
wavelengths from about 0.3 meters to several kilometers , general television
and radio broadcasting band is to use this wave ; (2 ) Microwave - wavelengths
from 0.3 m to 10 ^ -3 meters , these waves is used in radar or other
communications systems; (3 ) Infrared - wavelengths from 10 ^ -3 m to 7.8 × 10
^ -7 m;(4 ) visible - this is a very narrow band of people can photosensitive .
Wavelengths from 780-380nm. Atoms alone intramolecular electronic state of
motion or change in the emitted electromagnetic waves. As it is we can directly
feel and perceive little waves that part ; (5 ) UV - wavelengths from 3 × 10 ^
-7 m to 6 × 10 ^ -10 meters. For similar reasons , and waves generated by
these waves , often issued at the time of discharging. Because of its energy
and general chemical reaction involved a considerable amount of energy , and
therefore the strongest chemical effects of ultraviolet light ;6 ) Roentgen Ray
- this part of the electromagnetic spectrum , wavelengths from 2 × 10 ^ -9 m
to 6 × 10 ^ -12 meters. X-rays (X-ray ) is the inner electron electric atomic
energy state by a jump to another when the energy state at the time of the
nuclei or electrons emitted by the electric field deceleration ; (7 ) gamma
rays - is the wavelength of from 10 ^ -10 to 10 ^ -14 meters of electromagnetic
waves. This invisible electromagnetic waves are emitted from the nucleus to the
radioactive material or nuclear reaction in which radiation is often
accompanied by the issue . penetrating γ -rays is very strong, very
destructive to organisms . Seen in this light , the laser energy is not great ,
but its energy density is large ( because its scope is very small, usually only
one point ) , a short time gathered from a lot of energy , it can be used as
weapons understand.