Final answer:
The electromagnetic spectrum covers radiation with wavelengths ranging from less than 0.01 nanometers (gamma rays) to more than 1 kilometer (radio waves), including the visible spectrum from 380 to 740 nanometers.
Step-by-step explanation:
The electromagnetic spectrum includes radiation with wavelengths from less than 10-¹² meters (or 0.01 nanometers) to more than 10³ meters (or 1 kilometer). The spectrum covers a wide range of wavelengths including gamma rays with the shortest wavelengths, followed by X-rays, ultraviolet, the visible spectrum of light (ranging from 380 to 740 nanometers), infrared, microwaves, and finally radio waves with the longest wavelengths. Within the visible light spectrum, our eyes can perceive wavelengths roughly between 400 to 700 nanometers.