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It means that only part of the electrical energy used up gets converted into useful light; another part of the energy gets converted into other types of energy, mainly heat. If this energy waste could be avoided (so that the light bulb produces only light, and no heat), then you would get the same result at a lower cost.
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What is meant by saying that energy is conserved?
Energy conservation can be defined as when we save energy. Examples : when we have two bulbs lighting and we take off one.
How does a florecent light bulb save energy?
I think you meant "use less energy" rather than "saves less energy"...Incandescent light bulbs generate light by heating a filament until it glows brightly. A great deal of energy is lost as heat and only a little energy is converted to visible light.Fluorescent light bulbs (whether "compact" or not) generate light by exciting the atoms in the phosphor coating on the inside of the bulb. This is more efficient, as there is less heat generated, so less electricity is needed to produce the same amount of light.LED lights are even more efficient than fluorescent, but they are still rather expensive for general lighting.
What energy is wasted from a lamp?
that is dependant on the wattage of the bulb, the wattage 40W, 60W, 100W, is the rated power that a bulb will use. 1kW is equal to 1000W 1kWh is equal to 1000W per hour. kW stands for kilo watt I hope that helps
What is meant by the phrase to focus light?
to focus light means to condense the energy of a light beam down to a smaller beam through refraction.
What is meant by the phrase 'light scattering'?
Light scattering is referred to as a form of scattering in which light is the form of propagating energy which is scattered. Deflection of a ray from a straight path can be thought as light scattering.
How do you replace 93 Cadillac sts trunk light bar?
you cannot replace the individual bulbs- they are meant to last the lifetime of the car. best solution is to get a completely new trunk...
What is meant by periodisation in relation to training?
Periodisation (in relation to training) is the different parts in the training programme.
Why were brothels call cat houses?
There would be a hollow china cat in the main window of a brothel with two light bulbs (red & green), if the eyes were green it meant they were open for business, if the eyes were red, it meant the police were nearby. If the cat was showing its rear end, it meant they were closed.
What is meant by solar cell?
A solar cell is an electrical device that converts the energy of light directly into electricity by the photovoltaic effect.
What is meant by nutral in relation to acids and alkalis?
solling on legs
What is meant by conservation of energy?
It is meant to transfer energy from one form to another.
What is meant by wavelength?
Defined as the distance or length between one peak of a wave of light, heat or other energy and the next corresponding peak.
