Light reflects in the same manner that any wave would reflect. Light refracts in the same manner that any wave would refract. Light diffracts in the same manner that any wave would diffract. Light undergoes interference in the same manner that any wave would interfere. And light exhibits the Doppler effect just as any wave would exhibit the Doppler effect.
Snooker referees in this industry earned an annual mean wage of $27,050 that year. Those employed in other amusement and recreation industries earned an annual mean wage of $23,640, while those employed by elementary and secondary schools earned an annual wage of $36,320.nnual Wage. The BLS reported the median annual wage for snooker referees and umpires, referees and other sports officials in general was $22,820 in May 2010.
Referees and umpires get paid much differently depending on the sport. For the first example, let's take the most watched sport in the world: football (known to Americans as soccer). European soccer referees get paid, on average, about the equivalent of $120,000 a year (salary plus match fees).f course, this depends on the quality of the referee, but it is quite apparent that this is nothing compared to soccer players (about a two weeks salary in average). For the most watched sport in the United States, American football, referees get paid much higher.