Introduction:
Most of the light move in straight line but the invisible light move in waveslenghts,also the invisible light is part of the Electromagnetic Spectrum.People can not see waveslenghts longer than red and shorter than violet,we can detect them, and we can use it in many ways this light is called invisible light.
Examples of Invisible Light:
Radio waves: the Radiowaves have the longer wavelenghts of the Electromagnetic Spectrum (1,000 meters) so they use it to carry signals in codes (AM,FM).Radio stations use Radio waves to carry sounds.
Microwaves: Is a short wave radio waves.Water in food absorb micro waves very readily.The energy from the absorbed microwaves speeds up the the water molecules inside the food.
Infrared light: It means "just beyond red."Infrared waves are next to visible red waves in the spectrum .When you stand in sun light , it is Sun`s infrared waves that warm you.
Ultraviolet light : Ultraviolet light is made up of waves just shorter than visible violet light on the spectrum.
(UVlight) is also a form of call the ultraviolet light. UVlight give us vitamin D that help us for have healthy bones.
X rays and gamma rays: the shortest waveslengths of the spectrum are the X rays and Gamma rays. They are dangerous for health. X rays can pass right through most objects. Thicker or denser object tend to absorb X rays. This means that x rays can produce a picture when they pass through an arm or leg, or your jaw. The denser objects such as bones and teeth, can show up very clearly on the finish pictures.
Blu ray: Blu-ray is an optical disc format such as CD and DVD. It was developed for recording and playing back high-definition (HD) video and for storing large amounts of data.
Conclution: There are many wavelenghts that we cant see, but we can detect them. We call this Invisible light and they have importants properties and uses.
