Ko ngā tōpana kei te mata o tētahi wē i rō ipuipu, ānō nei he kiri roroha. Nā te renarena mata e kōpapa ai te āhua o te mata o te wē. Ka kīia ko te mata kōpapa.
The forces at the surface of a liquid in a tube that make it behave as though it is an elastic skin. Surface tension results in a concave surface which is called a meniscus.