I'm guessing you mean electromagnetic spectrum.
It is basically the range of light the exists, dependant on that particular light's wavelength and frequency. The main ones are:
Radio, microwave, infrared, visible light, ultra violet, x ray, gamma ray
Radio waves have the longest wavelength and lowest frequency, whilst gamma rays have the shortest wavelength but highest frequency.
In the visible light section it then gets split up into all the colours of the rainbow in the same order, with red on the side of radio waves.
Hope that clears it up a little
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The electromagnetic spectrum is a range of all types of electromagnetic radiation. It includes radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays, ordered by increasing frequency and decreasing wavelength. Each type of radiation has different properties and uses, such as radio waves for communication and X-rays for medical imaging.
radiowaves, microwaves, infra-red, visible, ultraviolet, x-rays, gamma rays
Electromagnetic energy travels in transverse waves, which means that the electric and magnetic fields oscillate perpendicular to the direction of wave propagation. This characteristic allows electromagnetic waves to interact with matter in various ways, such as reflection, refraction, and absorption. The spectrum of electromagnetic waves includes radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays.
The rainbow displays a spectrum of colors from red to violet.
We can see the visible spectrum of light, which ranges from violet to red. This spectrum includes all the colors of the rainbow.
Most stars exhibit a continuous spectrum, which contains all wavelengths of light in a continuous distribution. This is often referred to as a blackbody spectrum due to its smooth curve.