Optical Reader
Although incandescent light bulbs remain a convenient source of light, as they have been for a long time, they are now an obsolete technology, because there are other sources of artificial light which are much more energy efficient. Fluorescent lighting is more energy efficient, and LEDs are even more energy efficient that fluorescent lighting.
The bulb converts energy from the power source into light and heat. It is the load in the circuit.
A fixture or device that holds a light in place by means of some sort of socket, that is connected to a power source.
Luminous efficacy is a figure of merit for light sources. It is the ratio of luminous flux (in lumens) to power (usually measured in watts). As most commonly used, it is the ratio of luminous flux emitted from a light source to the electric power consumed by the source, and thus describes how well the source provides visible light from a given amount of electricity.This is also referred to as luminous efficacy of a source.
In digital communications, a digit is either a one or a zero, or an "on" or an "off" signal. The wave shape that is composed of "on's and off's" is the square wave.
Light is not naturally digital - perhaps you mean solid state? Digital light as in a fibre-optic cable is just laser light modulated.
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Dams are a source of hydroelectric power that convert the energy of flowing water into electricity.
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The SOURCE of energy for producers is the sun, plants convert the suns light from light energy to into chemical energy.
Bacteria that can absorb light energy and convert it into ATP are commonly called phototrophic bacteria. They use light as an energy source for photosynthesis, similar to plants.
the energy source for Photosynthesis is light.
The direct source of energy for phototrophs is light. They use light energy to convert carbon dioxide and water into glucose through a process called photosynthesis.
{| |- | 149476000 km = 0.00001579996 light year source: http://www.convert-me.com/en/convert/length |}
We need light in photosynthesis as Light provides the energy source. The process is based on light. The plants use light to convert energy. The same reason that we need air to breath.
A light pen can be used to draw on a computer screen.