The term "electromagnetic spectrum" (EMS) refers to the entire range of electromagnetic radiation. Wavelengths rise from roughly 10⁻¹⁸ m to 100 km.
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."
Below are the different regions of the electromagnetic spectrum with their wavelengths:
Gamma rays - < 10⁻¹²
X-ray - 1 nm - 1 pm
Ultraviolet rays - 400 nm - 1 nm
Visible light - 750 nm - 400 nm
Infrared - 25 μm - 2.5 μm
Microwaves - 1 mm to 25 μm
Radio waves - > 1 mm
Learn more about the electromagnetic spectrum here:
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