The interaction of a beam that does not actually hit a ball, but aims to one side of it, is called a "deflection". The angle of deflection of the beam is always 90 degrees. Example: The ball shown would deflect beam "2" upward, as shown, but this is not the only possibility.
Bola bat jotzen ez duen izpi baten elkarreragiketa, baina bere alde bat ukitzen badu, "desbideraketa" deitzen zaio. Izpiaren desbideraketaren angelua beti da 90 gradu. Adibidea: erakusten den bolak "2" izpia gorantz desbideratu beharko luke, baina hau ez da aukera bakarra.