Infrared/ Ultravilote
Visible light is the electromagnetic wave that falls within a small band of the broad electromagnetic spectrum. It is the only portion of the electromagnetic spectrum that is visible to the human eye.
The lower frequency waves are infrared, the higher ones are ultraviolet.
There are many types of waves covered by physics. Only electromagnetic waves in the visible light band have the property that we call "color".
That's called visible light.
The total of all electromagnetic waves is called the electromagnetic spectrum. The electromagnetic spectrum includes radio waves, microwaves, infrared radiation, visible light waves, ultraviolet radiation, x-rays, and gamma rays. Only visible light waves, which humans see as the band of colors from red to violet, are the portion of the spectrum visible to the human eye, although many other life forms are sensitive to infrared and possibly to other segments the spectrum.
The visible spectrum is one band within the full range of electromagnetic radiation.
Visible light consists of the band of wavelengths to which the structure of the human eye is sensitive. Radiation outside of that band may enter the eye, but there's nothing in there that responds to it, so the brain remains unaware of it.
We're allowed to see anything we want to. Unfortunately, we only have equipment todetect the visible light band with our eyes, and the heat band with our nerve-endings.If there are waves of any other band in the room, we don't even know it.
Visible light is part of what is called the electromagnetic spectrum. Light is electromagnetic energy, and so are radio waves, microwaves, X-rays and gamma rays.
Visible light consists of the band of wavelengths to which the structure of the human eye is sensitive. Radiation outside of that band may enter the eye, but there's nothing in there that responds to it, so the brain remains unaware of it.
The band of the electromagnetic spectrum that has a wavelength between infrared and ultraviolet is the visible light spectrum. This is the portion of the electromagnetic spectrum that is visible to the human eye and includes colors such as red, green, and blue.
WiFi uses electromagnetic waves in the microwave band, around 2.4 GHz or 5 GHz.