The range of wavelengths or frequencies that electromagnetic radiation covers is known as the electromagnetic spectrum.
The color spectrum of typical white light, which ranges from red and orange to blue and purple, is truly a rainbow of distinct colors. We are unable to see many additional "colors" of light. These include "light" in the infrared and ultraviolet (UV) spectrums that are just outside the range of human eyesight. Additionally, they contain more unusual types of radiation like X-rays, gamma rays, and radio waves. The electromagnetic spectrum is the collective name for all of these many lights' "colors."
The electromagnetic spectrum consists of the following regions:
Wavelengths Frequency
Gamma rays - < 10⁻¹² 10²⁰ - 10²⁴
X-ray - 1 nm - 1 pm 10¹⁷ - 10²⁰
Ultraviolet rays - 400 nm - 1 nm 10¹⁵ - 10¹⁷
Visible light - 750 nm - 400 nm 4 - 7.5 × 10¹⁴
Infrared - 25 μm - 2.5 μm 10¹³ - 10¹⁴
Microwaves - 1 mm to 25 μm 3 × 10¹¹ - 10¹³
Radio waves - > 1 mm < 3 × 10¹¹
Learn more about the electromagnetic spectrum here:
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