GENERAL KNOWLEDGE

Detailed explanation-1: -The wavelength of the visible spectrum is in the range of 3900 A-7600 A (A is angstrom). The visible spectrum is VIBGYOR (Violet, Indigo, Blue, Green, Yellow, Orange, Red). Violet has the shortest wavelength, at around 380 nanometers, and red has the longest wavelength, at around 700 nanometers in this spectrum.

Detailed explanation-2: -Thus, the visible spectrum has an infinite number of wavelengths.

Detailed explanation-3: -These regions represent large numbers of individual wavelengths; thus, the red extends roughly from 7600 angstrom units to 6500, the yellow from 6300 to 5600, green from 5400 to 5000, blue from 5000 to 4200, and violet from 4200 to 4000.