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.
La interacció d' un feix que no toca una bola exactament, però toca un costat d' una, s' anomena "desviament". L' angle de desviament del feix és sempre 90 graus. Exemple: La bola mostrada podria desviar el feix "2" cap amunt, com es mostra, però aquesta no és la única possibilitat.