Infrared waves are a type of electromagnetic radiation with wavelengths longer than visible light but shorter than microwaves. They are commonly used in various technologies, such as remote controls, thermal imaging, and night vision devices. Infrared waves can be detected as heat, which is why they are often associated with warmth. These waves are divided into three categories: near-infrared, mid-infrared, and far-infrared, each with different applications. For example, near-infrared is used in fiber optic communications, while far-infrared is often utilized in heating applications and medical therapies. Understanding infrared waves helps in various fields, including astronomy and environmental monitoring.