The tiny particles that you may observe floating in the air and becoming more noticeable in strong light are typically known as airborne particles or particulate matter. These particles can come from various sources and can have different compositions.
Some common examples of airborne particles include:
- Dust: Small particles of soil, pollen, skin cells, and other organic matter that can become airborne and float in the air.
- Pollen: Microscopic particles produced by plants for the purpose of reproduction. Pollen grains can become airborne and cause allergies in some individuals.
- Smoke: Particles generated by the combustion of materials such as wood, coal, or tobacco. Smoke particles can range in size and composition depending on the source.
- Air pollution: Particles emitted from industrial activities, vehicle exhaust, or other human-made sources. These particles can include soot, metals, and other pollutants.
- Atmospheric particles: Microscopic particles suspended in the atmosphere, such as aerosols, haze, or mist. These particles can be natural (e.g., sea salt, volcanic ash) or anthropogenic (e.g., pollution).
When light passes through the air, it can scatter off these tiny particles, making them visible as they reflect or refract the light. This phenomenon is often referred to as "scattering" or "light scattering." It is more noticeable in strong light because the particles become illuminated and stand out against the background.
It's worth noting that the composition and concentration of airborne particles can vary depending on the environment and location. In some cases, excessive levels of certain particles can have negative impacts on air quality and human health.