By maryana36
1 years ago

The light

Light is a flux of photons, particles possessing both wavelength properties and corpuscular properties. The wavelength properties of the light are manifested mainly in propagation phenomena (reflection, refraction, interference, diffraction, polarization, etc.) and the copuscular ones in the emission and absorption phenomena, in the photoelectric effect, the effect of Compton s.a. The light spectrum is approximately between 4000 A (violet light) and 7500 A (red light). The term light is sometimes used for invisible ultraviolet radiation (with wavelengths between 100 and 4000 A) and infrared (with a wavelength of 0.75 to 500 M), which are produced by the same means as those used for producing visible light. The speed of light transmission in vacuum is 299792.5 km / s. V. and 'optics'
- Monochromatic light, light of one wavelength; in the visible field is represented by a single spectral color.
- The composite light, which contains several wavelengths of radiation (eg White Light).
- The white light, the light that contains all the radiations of the visible spectrum so large that they give the middle light of the day.
- Cold light Low light in infrared radiation. Unlike incandescent lamps, discharge lamps emit cold light.
- Natural light, the light characterized by the diversity of the oscillation (transversal) directions of the electromagnetic radiation that compose it; Statistically, these directions are evenly distributed around the propagation direction.