How Computers Affected People’s Daily Life - amazonia.fiocruz.br

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How Computers Affected People’s Daily Life Video

Stepping outdoors into sunlight; flipping on a wall switch indoors; turning on your computer, phone or other digital device — all of these things result in your eyes being exposed to a variety of visible and sometimes invisible light rays that can have a range of effects. Most people are aware that sunlight contains visible light rays and also invisible ultraviolet rays that can tan or burn the skin. Sunlight contains red, orange, yellow, green and blue light rays and many shades of each of these colors, depending on the energy and wavelength of the individual rays also called electromagnetic radiation. Digital electronic devices emit blue light that can cause eye strain and may lead to eye How Computers Affected People’s Daily Life over time. Without getting into complicated physics, there is an inverse relationship between the wavelength of light rays and the amount of energy they contain. Light rays that have relatively long wavelengths contain less energy, and those with short wavelengths have more energy.

Rays on the red end of the visible light spectrum have longer wavelengths and, therefore, less energy. Rays on the blue end of the spectrum have shorter wavelengths and more energy.

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The electromagnetic rays just beyond the red end of the visible light spectrum are called infrared — they are warming but invisible. But these lamps also emit visible red light so people know they are on! The same is true for other types of heat lamps. On the other end of the visible light spectrum, blue light rays with the shortest wavelengths and highest energy are sometimes called blue-violet or violet light. This is why the invisible electromagnetic rays just beyond the visible light spectrum are called ultraviolet UV radiation. UV rays have higher energy than visible light rays including blue lightwhich makes them capable of producing changes in the skin that create a suntan. The bulbs in tanning booths emit a controlled amount of UV radiation specifically for this reason. Too much exposure to UV causes a painful sunburn — and even worse, can lead to skin cancer. These rays can also cause sunburned eyes — a condition called photokeratitis or snow blindness.

But ultraviolet radiation, in moderation, also has beneficial effects, such as helping the body manufacture adequate amounts of vitamin Click here. Generally, scientists say the visible How Computers Affected People’s Daily Life spectrum comprises electromagnetic radiation with wavelengths ranging from nanometers nm on the blue end of the spectrum to about nm on the red end.

By the way, a nanometer is one billionth of a meter — that's 0. Blue light generally is defined as visible light ranging from to nm.

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Blue light sometimes is further broken down into blue-violet light roughly to nm and blue-turquoise light roughly to nm. Like ultraviolet radiation, high-energy https://amazonia.fiocruz.br/scdp/blog/purdue-owl-research-paper/the-technique-of-gene-cloning-has-important.php blue light has both benefits and dangers. Here are important things you should know about blue light:. Sunlight is the main source of blue light, and being outdoors during daylight is where we get most of our exposure to it.

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But there are also many man-made, indoor sources of blue light, including fluorescent and LED lighting and flat-screen televisions. Most notably, the display screens of computers, tablets, smartphones and other digital devices emit significant amounts of blue light. The amount of HEV light these devices emit is https://amazonia.fiocruz.br/scdp/blog/story-in-italian/symptoms-and-treatment-of-therapeutic-therapy-for.php a fraction of that emitted by the sun. High-energy blue light rays scatter more easily than other visible light rays when they strike air and water molecules in the atmosphere.]