There are two types of photoreceptors, the cones and the rods. The cones function in bright light and there are three types that are maximally sensitive to different colours, which allows the ratio of their responses to code colour.
Medioimages/Photodisc/Photodisc/Getty Images. Most PGA Tour caddies make a salary of between $1,000 and $1,500 a week, plus a percentage of the playerâs winnings each week. A common rate is 5 percent for finishes outside the top 10, 7 percent for non-winning top-10 finishes and 10 percent if the golfer wins.
Average Salary. Professional golfers earn their salary largely through the PGA Tour. As such, a 2010 article for ESPN lists the average salary of the top 250 golfers on the tour at $1.1 million. In comparison, the United States Golf Association strictly prohibits amateurs from accepting any prize money.