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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.
What else can I help you with?
What energy is wasted from a lamp?
In a lamp, the energy that is wasted primarily comes in the form of heat. Incandescent light bulbs, for example, waste a significant amount of energy as heat due to the inefficiency of converting electricity into light. This wasted heat energy contributes to the overall inefficiency of traditional incandescent bulbs compared to more energy-efficient options such as LED or CFL bulbs.
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 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 periodisation in relation to training?
Periodisation (in relation to training) is the different parts in the training programme.
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...
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 nutral in relation to acids and alkalis?
solling on legs
What is meant by saying that energy is conserved?
Saying that energy is conserved means that the total amount of energy in a closed system remains constant over time. Energy can change forms or be transferred between objects, but the total energy within the system remains the same.
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 wavelength?
Defined as the distance or length between one peak of a wave of light, heat or other energy and the next corresponding peak.
What is meant by transformation of energy (Give two examples.)?
Transformation of energy refers to the process of changing energy from one form to another. For example, the potential energy of water at a height can be transformed into kinetic energy as it falls, or electrical energy from a power plant can be transformed into light and heat energy in a lightbulb.
What is meant by nonrewable energy?
Energy that you can't get back.
