Wavelength is defined as the distance between the repeating parts of any propagating wave of a particular frequency. Wavelength is designated by the symbol, or rather the Greek letter (λ) lambda. Water waves, sound waves, light, or any other type of electromagnetic wave exhibits the wave like phenomenon and is associated with a particular wavelength and frequency.
Wavelength and frequency are inversely proportional and related by the formula that wavelength equals speed of wave divided by the frequency of the wave. Thus, waves that have higher frequencies have shorter wavelengths as compared to low frequency waves, provided the speed of both is the same. Light waves in vacuum travel at the speed of light; hence their speed is 3×108 m/s.
The difference in wavelengths is how the different kinds of electromagnetic energy are differentiated. Visible light is in the range of 700 nm wavelength to 400 nm. This corresponds to 430 to 750 THz in frequency. Sound that is audible to the human ear is between the 20 Hz to 20 KHz frequency which corresponds to wavelengths of 17 m to 17 mm. Thus audible sound wavelengths are much higher than the wavelengths of visible light.
As the medium changes, the wavelength of a wave can change even though the frequency remains the same because the speed of the wave changes. While electromagnetic radiation is usually quoted in terms of wavelength of the wave when traveling in vacuum, wavelengths of sound waves are expressed in those of a medium, as sound requires a medium to travel.
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Saturday, January 17, 2009
Tuesday, January 13, 2009
Things to Consider Before You Install a Solar Energy System
Once you've made the choice to purchase, install, and use a solar energy system, your journey from conceptualization to reaping the efficiency and savings benefits is likely to be a short one. While there are a few considerations and choices to keep in mind while choosing parts and implementing the system into your overall structural design, the process is a relatively simple one and can be done on your own, or with the assistance of a solar panel technician.
If you choose to design and install a set of solar panels by yourself, be sure to keep the following in mind, and as with any project, avoid low-quality components, as their small initial savings will lead to headaches and increased costs down the line.
Choosing appropriate specifications for your panels and subsequent battery bank is an important step, which should follow the determination of your overall solar energy load. Upon deciding how many appliances you'd like to run on solar energy, and obtaining their voltage requirements, you can arrange for an appropriate solar array and corresponding battery bank for optimal operation.
A proper understanding of the wiring requirements for connections between system components will ensure smooth operating and help prevent any shortages or other accidents.
Be sure to consider grounding your solar panels along with their system accessories via a grounding wire and rod; in addition to keeping you and your system safe from shock and fire, grounding is required in many areas by local laws.
When installing solar panels, keep common-sense placement in mind; areas with ample sunlight according to the season and directional orientation will work better than locations with shadows cast by trees or other obstructing objects.
The purchase and installation of important solar panels accessory components such as a controller (to regulate the energy flow between solar panels and the battery bank), and an inverter (to process energy from the battery bank to the electric system of your home or project location) will make easy and efficient system operation possible.
Once you've completed installation of your solar panels, there is little to no maintenance needed. The batteries themselves are the only components requiring mechanical upkeep of any kind.
Aside from reading the output on your controller to ensure you're getting the most from your solar panels, there's little work to be done, allowing you to sit back and enjoy the satisfaction of a self-sufficient power system that saves you money while helping to preserve the earth's precious natural resources.
If you choose to design and install a set of solar panels by yourself, be sure to keep the following in mind, and as with any project, avoid low-quality components, as their small initial savings will lead to headaches and increased costs down the line.
Choosing appropriate specifications for your panels and subsequent battery bank is an important step, which should follow the determination of your overall solar energy load. Upon deciding how many appliances you'd like to run on solar energy, and obtaining their voltage requirements, you can arrange for an appropriate solar array and corresponding battery bank for optimal operation.
A proper understanding of the wiring requirements for connections between system components will ensure smooth operating and help prevent any shortages or other accidents.
Be sure to consider grounding your solar panels along with their system accessories via a grounding wire and rod; in addition to keeping you and your system safe from shock and fire, grounding is required in many areas by local laws.
When installing solar panels, keep common-sense placement in mind; areas with ample sunlight according to the season and directional orientation will work better than locations with shadows cast by trees or other obstructing objects.
The purchase and installation of important solar panels accessory components such as a controller (to regulate the energy flow between solar panels and the battery bank), and an inverter (to process energy from the battery bank to the electric system of your home or project location) will make easy and efficient system operation possible.
Once you've completed installation of your solar panels, there is little to no maintenance needed. The batteries themselves are the only components requiring mechanical upkeep of any kind.
Aside from reading the output on your controller to ensure you're getting the most from your solar panels, there's little work to be done, allowing you to sit back and enjoy the satisfaction of a self-sufficient power system that saves you money while helping to preserve the earth's precious natural resources.
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