1. Radio waves: These have the longest wavelengths, ranging from a few millimeters to many kilometers.
2. Microwaves: With wavelengths ranging from a few millimeters to a few centimeters, microwaves are used in communication and cooking.
3. Infrared radiation: Infrared radiation has wavelengths longer than visible light, but shorter than microwaves. It is associated with heat.
4. Visible light: This is the portion of the electromagnetic spectrum that our eyes can see. It ranges from red (longest wavelength) to violet (shortest wavelength).
5. Ultraviolet radiation: UV radiation has wavelengths shorter than visible light. It can cause sunburn and skin cancer.
6. X-rays: X-rays have wavelengths shorter than ultraviolet radiation. They are used in medical imaging.
7. Gamma rays: Gamma rays have the shortest wavelengths of the electromagnetic spectrum. They are emitted by radioactive materials.
This arrangement is often remembered using the acronym "Radio, Microwave, Infrared, Visible, Ultraviolet, X-ray, Gamma".
