This national public education campaign is designed to increase awareness among parents of children ages 8 to 12 about the causes and prevention of noise-induced hearing loss.
Our eyes are what allow us to see. Our eyes are designed to detect a small portion of the electromagnetic spectrum. This part of the spectrum is called the visible light region. The visible light region ranges in wavelengths from about 380 or 400 nm to 700 or 780 nm depending on which source is used. In fact it also depends on the sensitivity of a specific persons eyes.
The range of wavelength where em-radiation is defined as visible light. is approximately between 400nm to 700nm, where one nanometer (nm) equals to 0.000 001 millimeters. Shorter wavelength (more energy) radiation is called ultraviolet. Longer. wavelength (less energy) radiation is called infrared.