GENERAL KNOWLEDGE

Detailed explanation-1: -“The visible spectrum is the portion of the electromagnetic spectrum that is visible to the human eye.” “A typical human eye will respond to wavelengths from about to about nanometers.” The red colour has the highest wavelength and the shortest frequency.

Detailed explanation-2: -In the visible spectrum red to violet, red has the highest wavelength [650 nm] as well as the lowest frequency.

Detailed explanation-3: -Red light has relatively long waves, around 700 nm long. Blue and purple light have short waves, around 400 nm. Shorter waves vibrate at higher frequencies and have higher energies. Red light has a frequency around 430 terahertz, while blue’s frequency is closer to 750 terahertz.