Lumen - In physics, specifically photometry (optics), the lumen (symbol: lm) is the SI derived unit of luminous flux. It is the amount of light that falls on a unit spherical area at unit distance from a sour. Used . ce of one candela. In steradians this is equivalent to the amount of light that falls on a unit solid angle from a light source of one candela. Alternatively, one lumen is the total light pro. Used . duced by an isotropic light source of (1/4p) candelas. A 100 watt incandescent light bulb will output around 1500 lumens. ...
Alternating Current - An alternating current (AC) is an electrical current where the magnitude and direction of the current varies cyclically, as opposed to direct current, where the direction of the current stays constan. Used . t. The usual waveform of an AC power circuit is a sine wave, as this results in the most efficient transmission of energy. However in certain applications different waveforms are used, such a. Used . s triangular or square waves.
Used generically, AC refers to the form in which electricity is delivered to businesses and residences. However, audio and radio signals carried on electrical wire ar
1000 - 5000 Lumens - A projector that produces 1000 - 5000 lumens of light.. Used . . Used . ...
Depth of Field - While a lens focuses on a single plane of depth, there is usually an additional area in focus behind and in front of that plane. This is depth of field. Depth of field increases as the iris is closed.. Used . There is more depth of field the wider the lens and le . Used . ...
Video - Video is the technology of electromagnetically recording, processing, transmitting, and reconstructing a sequence of images that represent scenes in motion.
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