What is Light
The frequencies which are visible to the human eyes are known as light. Apart from the visible frequencies, there are many non visible electromagnetic frequencies, which could be seen only from certain animals. For example, the bees can see the ultraviolet range of the light which can help them to find the patterns in the flowers. This ultraviolet range cannot be seen by humans in the naked eye. The electromagnetic radiations that forms light include magnetic properties and these radiations move from one position to another.
Every electromagnetic frequency comprises of two items namely the frequency and the amplitude. The frequency of the electromagnetic radiation refers to the movement of waves passing a stationery point in a second. The amplitude of the electromagnetic wave refers to the height of the wave. The intensity of the light can be decided by looking at the frequency and amplitude of the electromagnetic frequency. The wavelength of the visible range of light is between 400 to 700 nanometers. Each nanometer refers to the one billionth of a meter.
There are multiple properties of light. Light is basically white in color but when the light is passed through a prism, seven colors are emitted called the VIBGYOR. VIBGYOR refers to violet, indigo, blue, green, yellow, orange and red. These colors are not seen in by human eyes as they are of visible range and are of different frequencies. The light with the highest visible light spectrum is red. Red is formed with the presence of longer light waves and shorter frequencies. Violet or the blue are the colors of light which are formed when there are shorter light waves and longer frequencies. Ultra violet rays are those high energy rays which are ultra short and are between the blue and violet rays.
Some of the properties of lights are that the black light has the property of radiating light after absorbing the extra radiation. The radiation that is absorbed is not visible. The infrared light has a particular wavelength which helps in the location of objects with its temperature. Through infrared light, one can located the warm object and the cold objects with different color. Infrared waves have wide applications and some are broadcast spectrum and the use of infrared waves as the radio waves. Beyond the spectrum, there lie x-rays and the gamma rays which have wide applications too.
Light is the most essential thing on earth. Without the presence of light, life would not have existed on planet earth. Light emitted from the sun is naturally made but man with his intelligence has used light to his benefits.