The History of Lighting

The history of historical lighting is a long story that can be traced back to the discovery of the shadow of the wall. Lighting like people has both past, present and future. Lighting is a tricky world, too much, it makes the subject dazzle, and if it is too little you do not know where you are going. The appropriate amount of light depends on the overall atmosphere of the room, the subject, movement, scene, and scene, but it depends on the precise amount of light and lack of light.

In one respect, the history of lighting is similar to the history of urban development. Lighting solutions may be the center of city renewal projects. Alternatively, deficiencies in the management of lighting facilities can be traced back to the history of unequal infrastructure distribution during the colonial era. In other words, lighting illuminates the place and idea. If you imagine the interaction between light and urbanization and there are more artistic ways to reveal the impact of digital technology in urbanization and cultural processes based on physical and social aspects, - Economic and technical structure of Smart City

In the majority of history, visible light is the only known part of the electromagnetic spectrum. The ancient Greeks recognized that light progressed linearly and studied some of its properties, including reflection and refraction. The study of light has continued, and in the 16 th and 17 th centuries, contradictory theories captured light as waves and particles. In 1800, when William Herschel found infrared, electromagnetic waves other than visible light were first discovered. He is examining the temperature of various colors and moves the thermometer to the light separated by the prism. He noticed that the maximum temperature exceeded red. He speculates that this temperature change is caused by "heat rays" which are invisible light.

Light is in the form of electromagnetic energy traveling through waves. The range of electromagnetic radiation is called the emission spectrum, and the small strip is visible light. Visible light is light detected by the naked eye. Visible light wavelength ranges from 400 to 700 nanometers. The proportion of light that plants absorb in photosynthesis varies with the color of light. Red and purple light are at both ends of the visible spectrum. The longest wavelength of red light is 700 nm and the wavelength of purple light is shorter 400 nm. Red light also has a lower frequency, while violet light has a higher frequency. White light is a mixture of all seven colors of the spectrum. When visible light passes through the prism, the light is refracted and each light is refracted to various degrees. Red light has the least refraction and purple light refracts