Also, just by just changing one of your regular incandescent light bulbs to a LED light, you can really assist to protect the environment and save money. Most LED downlights start around $40 per unit where are incandescent bulbs can be just $2 at your local electrician. The advantages of LEDs are myriad indeed. LED lights does saves you energy cost and money. A LED light bulb can be so durable it can last for at least 25,000 hours with some capable of lasting for 50,000 hours. LED Light are diodes which emit visible light when electricity is applied, much like a light bulb. LEDs are used as indicator lamps in many devices, and are known to offer latest technology lighting solutions http://www.new-lights.com/product/t5-fluorescent-lamp.html for modern residential lighting. LED technologies are rapidly improving and now days you can get the LED bulb and downlight.. Also most people are unsure how to go about buying and installing LED down lights for the homes as making such changes are often troublesome and people would rather stick with what they are most comfortable with. This means 5 times less energy used, 5 times more money saved on lighting bills and 5 times less harm down to the environment. Herein lies the strength of LED lighting systems. In fact, LED lighting solutions have come a long way from being used only for notebooks (laptops) and flashlights to presently being utilised in parking areas, street lights, offices, hotels, public buildings, restaurants and signboards,etc. When people refer to LED’s the first thing that normally springs to mind is those small lights that come in a huge range of colours used to indicate settings on devices. No doubt, therefore, http://www.new-lights.com/ by making transition from one lighting system to another, you could help save the otherwise vulnerable environment. An LED downlight is capable of producing the same amount of illumination that a normal 50W halogen light would produce for only 10W. What often stops people from using LED downlights? The main problem is that LED down lights are significantly more costly initially than normal downlights or halogens.The way you light up our homes could have negative and positive implications on our environment. Also because of the long lifespan of LED lights such as LED down lights, LED flood lights and LED circular lights, you will almost never have to worry about replacing them or getting a professional to do it so you can possibly save yourself some money there as well. These days you get LED TV’s and monitors as well. Although incandescent light bulbs are other options which may be cheaper and LED lights are the most expensive in the beginning, in the long term it will certainly pay off and save you some money. The lights in our hoses are normally halogen bulbs and most of them last for only 2500 hours before dying. They are also designed with safety in mind running significantly cooler than halogens, containing no toxic materials (like incandescent bulbs contain mercury) and have very little glass that can shatter and spread into small particles. As far as home lighting is concerned, new strides are being made not only in energy efficiency, but also the longevity of light sources.

That is how an electromagnetic wave, that is light, travels.

Radio waves, which enable radio communication, microwaves used in the oven for heating, infra red waves that enable viewing using night vision goggles, gamma rays emitted by radioactive nuclei, X-rays that enable skeletal imaging and visible light from the Sun are all electromagnetic waves! The primary difference among them is that they are electromagnetic waves carrying, different amounts of energy. Standing on the sea shore, you must have observed waves sloshing back and forth. The color or wavelength to which our eyes respond readily is 5550 Angstrom (green color). A changing or fluctuating electric field, creates a magnetic field and a fluctuating magnetic field creates an electric field.

Wavelength of Visible Light in Angstroms
An ’Angstrom’ is 10-10m. Also, they differ in their wavelength and frequency, which is a function of energy. The wavelength of visible light starts from 3800 Angstrom and extends up to 7500 Angstrom.















. This band is called ’visible’ because these are the only electromagnetic waves which we can see! This is so because our eyes have a mechanism like a receptor which responds to only this part of the electromagnetic spectrum!

That is the reason why we cannot see radio waves, infra red or gamma rays, because our eyes do not have the mechanism that could detect these waves. A wave is a periodic phenomenon. These are the wavelengths to which the human eye responds. There may be alien civilizations who could ’see’ radio waves or ultraviolet waves! All depends on the mechanism of and tuning of the receptors in the eyes.

So electromagnetic waves make a spectrum which is a gradation of waves according to their wave length or frequency. The ’wave length’ is distance between two consecutive peaks or troughs of a wave train. For example, a wave in the ocean, is a disturbance caused by wind, traveling through the sea water. The colors that we identify are different wave lengths of visible light.

What is the Wavelength and Frequency of a Wave?
A wave is a disturbance traveling through any medium. It consists of a peak and a trough, or what you could call a mountain followed by a valley.

Light as an Electromagnetic Wave
A light wave is a kind of wave, which does not require a material medium for propagation! They can travel through vacuum. Electromagnetism is a study of dynamic electromagnetic LED Bulbs fields that are light waves. That is how we see each other, because that is how visible light travels! For more on this read, ’Properties of Electromagnetic Waves’.
Wavelength of Visible Light Spectrum

Before going into depth of information about the visible light spectrum, let us get some basics cleared like what do you mean by wavelength and frequency. Hope this article has served its purpose and you have an idea about the wavelength of visible light and has cleared your confusion if any, about light. Out of this spectrum, one particular band of waves, is called ’Visible Light’. Violet color at 3800 Angstrom is the shortest wavelength of visible light and red color at 7500 Angstrom is the longest wavelength of visible light. Not surprisingly, evolution has bestowed us with eyes that respond to Led Tube the wave length range in which Sun radiates its energy. Light waves are traveling disturbances in electromagnetic field. Now let us see the numerical values for the wavelength of visible light.

You may now ask what is the longest wavelength of visible light or what is the shortest wavelength of visible light. The ’frequency’ of a wave is the number of waves passing a point in a second. Rarely do you find a single wave or a single disturbance traveling. What you normally observe is a wave train, that is a string of waves, one following the other.