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.
Though NFL referees earn lower yearly salaries than referees in the other major sports leagues, they actually earn a higher per game average. As of 2011, NFL referees were paid an average of around $70,000 per season.eferees work a total of 162 games. As such their per-game salary ranges between approximately $500 and $1,800 per game. Additionally, they receive four weeks of paid vacation, hotel accommodations and first-class air tickets.