Sound is a mechanical wave, not an electromagnetic wave.
It is certainly a very important part, but it is not a major part; 'visible light' makes up only a tiny part of the EM spectrum.
Most of the EM spectrum is visible light.
That part is called "visible light", or just "light".
The smallest part of the electromagnetic spectrum is the gamma rays. They have the shortest wavelengths and highest frequencies among all types of electromagnetic radiation.
Visible light is a very small part of the EM spectrum and it is intellectual laziness to refer to all EM radiation as light.
frequency and heat. (Color can change, too)
Cosmic rays are not part of the EM spectrum -- they are high energy charged particles.
The part of the electromagnetic spectrum that we can see is visible light. Visible light consists of the colors of the rainbow, ranging from violet at shorter wavelengths to red at longer wavelengths. This portion of the spectrum is detected by our eyes and is responsible for our sense of sight.
The highest frequency part of the electromagnetic spectrum is gamma rays. Gamma rays have the shortest wavelengths and highest energy of all electromagnetic waves.
The troposhpere is thick (relatively speaking) with gases and so more high energy EM waves are absorbed before they can reach the ground.
The highest frequency in the electromagnetic spectrum is found in gamma rays. These rays have the shortest wavelengths and the highest energy levels of all electromagnetic waves.
Humans can see colors in the visible light portion of the electromagnetic spectrum, which ranges from approximately 400 nanometers (violet) to 700 nanometers (red).