Aerosol physics is the study of tiny particles or droplets suspended in the air, known as aerosols. These particles can originate from natural sources, like volcanic eruptions and sea spray, or from human activities, such as industrial emissions and vehicle exhaust. Understanding aerosols is important because they can affect air quality, climate, and human health. Aerosols vary in size, composition, and behavior, influencing how they interact with light and other atmospheric components. They play a crucial role in cloud formation and can impact weather patterns. Researchers in aerosol physics use various techniques to measure and model these particles to better understand their effects on the environment.