Different colors of visible light correspond to different frequencies of light in the electromagnetic spectrum. The visible spectrum, which is the portion of the electromagnetic spectrum that our eyes can detect, consists of different colors that range from red to violet. Each color represents a different frequency of light.
When light passes through a prism or diffracts, it separates into its component colors, forming a continuous spectrum. The colors of the spectrum, in order from longest to shortest wavelength, are red, orange, yellow, green, blue, indigo, and violet.
The frequency of light is inversely proportional to its wavelength. In other words, as the wavelength decreases, the frequency increases, and vice versa. Therefore, colors with longer wavelengths correspond to lower frequencies, while colors with shorter wavelengths correspond to higher frequencies.
Here is the general order of colors in the visible spectrum, from lowest to highest frequency:
Red: Red light has the longest wavelength and the lowest frequency among the visible colors. It has a wavelength range of approximately 620 to 750 nanometers (nm).
Orange: Orange light has a slightly shorter wavelength and a slightly higher frequency than red light. It ranges from about 590 to 620 nm.
Yellow: Yellow light has a shorter wavelength and a higher frequency than orange light. It ranges from about 570 to 590 nm.
Green: Green light has a shorter wavelength and a higher frequency than yellow light. It ranges from about 495 to 570 nm.
Blue: Blue light has a shorter wavelength and a higher frequency than green light. It ranges from about 450 to 495 nm.
Indigo: Indigo light has a slightly shorter wavelength and a slightly higher frequency than blue light. It ranges from about 435 to 450 nm.
Violet: Violet light has the shortest wavelength and the highest frequency among the visible colors. It ranges from about 380 to 435 nm.
It's important to note that the boundaries between colors are not fixed and can vary depending on the specific context or interpretation. The above ranges are approximate and may differ slightly in different sources.