What is light beam?

Light Beam

A light beam or beam of light is a narrow projection of light energy radiating from a source into a beam. Sunlight is a natural example of a light beam when filtered through various mediums (clouds, foliage, windows, etc.). To artificially produce a light beam, a lamp and a parabolic reflector is used in many lighting devices such as spotlights, car headlights, PAR Cans and LED housings. Light from certain types of laser has the smallest possible beam divergence, thus producing the most parallel light beams possible.

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Some articles on light beam:

Lightbeam
... A light beam or beam of light is a narrow projection of light energy radiating from a source into a beam ... Sunlight is a natural example of a light beam when filtered through various mediums (clouds, foliage, windows, etc.) ... To artificially produce a light beam, a lamp and a parabolic reflector is used in many lighting devices such as spotlights, car headlights, PAR Cans ...
Light Beam - Other Applications
... remote control Intrusion alarm#Photo-electric beams People counter#Infrared beams Fibre optics Laser pointer Laser sight List of applications for lasers ...
Turbidity - Measurement
... some measure of attenuation (that is, reduction in strength) of light as it passes through a sample column of water ... but this approach of attenuation of a light beam through a column of water should be calibrated and reported in JTUs ... A property of the particles — that they will scatter a light beam focused on them — is considered a more meaningful measure of turbidity in water ...
Acousto-optics - Acousto-optic Devices - Acousto-optic Modulator
... interaction also makes it possible to modulate the optical beam by both temporal and spatial modulation ... A simple method of modulating the optical beam travelling through the acousto-optic device is done by switching the acoustic field on and off ... When off the light beam is undiverted, the intensity of light directed at the Bragg diffraction angle is zero ...
Hyperspace (science Fiction) - Normal Space
... under relativity, matter may not be able to travel along this limiting path, but light can travel along this path ... In fact, the path of the light beam from A to B is the theoretical limit ... No ship in normal space could follow the path of light in 4-D space time, but it can get arbitrarily close (until the energy required to go any faster exceeds the energy available) ...

Famous quotes containing the words beam and/or light:

    How can one beam alone support a house?
    Chinese proverb.

    Not yet the thirtieth year, the thirtieth
    Station where time reverses his light heels
    To run both ways, and makes of forward back;
    Whose long co-ordinates are birth and death....
    Allen Tate (1899–1979)