Capillary action –(sometimes capillarity, capillary motion, capillary effect, or wicking) is the ability of a liquid to flow in narrow spaces without the assistance of, or even in opposition to, external forces like gravity.

Capillary action (sometimes capillarity, capillary motion, or wicking) is the ability of a liquid to flow in narrow spaces without the assistance of, and in opposition to, external forces like gravity.

Capillary action (sometimes capillarity, capillary motion, or wicking) is the ability of a liquid to flow in narrow spaces without the assistance of, or even in opposition to, external forces like gravity.

Capillary action (sometimes capillarity, capillary motion, capillary effect, or wicking ) is the ability of a liquid to flow in narrow spaces without the assistance of, or

Capillary action (sometimes known as capillarity, capillary motion, or wicking) is the ability of a liquid to flow into narrow spaces without the assistance of, and in opposition to, external forces like gravity.

Capillary action (sometimes capillarity, capillary motion, capillary effect, or wicking) is the ability of a liquid to flow in narrow spaces without the assistance of, or even in opposition to, external forces like gravity.

Just in case we lost you there capillary action (sometimes also called capillarity, capillary motion, or wicking) is the ability of a liquid to flow in narrow spaces without the assistance of, or even in opposition to, external forces like gravity.

The device was used to introduce light into a water droplet to record the thermal capillary motion inside it.