Which statement is true about the electromagnetic spectrum?

-The visible spectrum includes radio waves, light, and gamma rays.

-Same wavelengths of light correspond to different colors.

-It contains a spectrum of visible light plus a wide array of nonvisible forms of radiation.

-The waves travel at a speed of 2.998 * 105 m/s.

The statement that tells a fact about the electromagnetic spectrum is the third option. Electromagnetic spectrum contains a spectrum of visible light and a wide array of non-visible forms of radiation. Electromagnetic spectrum is a common term for all frequencies and extended wavelengths of electromagnetic radiation or photons.