The electromagnetic spectrum is like a giant rainbow that includes all types of electromagnetic radiation. This rainbow stretches from really high-energy gamma rays to low-energy radio waves. Here’s a simple breakdown of its main parts:

• Gamma Rays: Less than 0.01 nanometers (nm)
• X-Rays: From 0.01 nm to 10 nanometers
• Ultraviolet Light: From 10 nm to 400 nm
• Visible Light: From 400 nm to 700 nm (this is what we can see!)
• Infrared Light: From 700 nm to 1 millimeter (mm)
• Microwaves: From 1 mm to 1 meter (m)
• Radio Waves: Greater than 1 m

This spectrum is really important for astronomy, which is the study of stars and planets. Astronomers use different parts of this spectrum to learn more about space.

Did you know that 90% of the universe is not visible when we look with our eyes? By using all the different wavelengths in the electromagnetic spectrum, astronomers can uncover mysteries about cosmic events and what the universe is made of.