GENERAL KNOWLEDGE

Detailed explanation-1: -The visible light spectrum is the segment of the electromagnetic spectrum that the human eye can view. More simply, this range of wavelengths is called visible light. Typically, the human eye can detect wavelengths from 380 to 700 nanometers.

Detailed explanation-2: -The sun, light bulbs, candles and fire are all things that people automatically think of when it comes to light, but visible light comes from many sources and in many colors. Some other sources of visible light include: television and computer screens, glow sticks, and fireworks.

Detailed explanation-3: -The photon energy of visible light ranges from 2 to 2.75 electron volts (eV) [5, 6, 7]; the energy of a photon is inversely proportional to the wavelength of the electromagnetic wave (see Table 1).

Detailed explanation-4: -Infrared waves, or infrared light, are part of the electromagnetic spectrum. People encounter Infrared waves every day; the human eye cannot see it, but humans can detect it as heat. A remote control uses light waves just beyond the visible spectrum of light-infrared light waves-to change channels on your TV.