Water droplets
Water droplets, is a small amount of water, can appear in any form. A simple vertical tubular object, slowly flowing liquid to the end, will form the most prone to water droplets. When the gaseous water met the surface of the cold objects, condensation will occur, excessive cooling of water vapor, atomized into water droplets, condensation phenomenon is due to the relationship between condensation. M is the weight of the water droplets; π is the pi; a is the orifice radius; λ is the surface tension of the liquid; α is the contact angle (m) is the maximum allowable weight of the water droplet at the end of the vertical tubular object. The angle between the extension tangent of the liquid surface and the rigid body contact point and the plane of the rigid body). This relationship is the basis for simply measuring the surface tension, commonly used in the oil industry. In addition, due to the refractive index of water and air, the light refracts and reflects on the surface of the raindrops, resulting in the formation of the rainbow. ...