Which of the following colors has the longest wavelength?

 

Solution:

Concept: Red, orange, yellow, green, blue, indigo, and violet are the wavelengths from longest to shortest. To be specific, color is the perception of different wavelengths of electromagnetic light by the eye.

These variations are visible to us as colors. Red light, with the longest wavelength, is at one end of the spectrum. The shortest wavelength is blue or violet light. White light is a blend of all the colors in the color spectrum.

The wavelength of red is the longest.