Putter
Ultraviolet light has a shorter wavelength than green light.
green
In th visible spectrum blue and violet light are shorter than green. x-rays are way shorter than green.
The modern equivalent of a mashie, which was a club used in early golf for short approach shots, is typically a 7-iron or an 8-iron. These clubs are designed for similar distances and trajectories, allowing for precision in shorter approaches to the green. Additionally, some golfers might use a pitching wedge for the same purpose, depending on the situation and distance.
To find protective distances if there is no fire at a hazardous materials incident, refer to the green section of the North American Emergency Response Guide.
In the orange bordered pages initial isolation and protective action distances are provided under public safety. For those substances that are toxic inhalation hazard,s they are highlighted in the yellow and blue bordered pages and their evacuation distances are located in the green bordered pages.
'Regulation' has different meanings in golf. Par is considered regulation. Hitting the fairway off the tee on a par 4 or 5 is considered a fairway in regulation (FIR) and hitting the green off the tee on a par 3, or hitting the green on a par 4 with your second shot, or hitting the green on a par 5 with your third shot is considered a green in regulation (GIR). The best way to think about regulation and par is that you should always get 2 puts to get par on a hole. Therefore if you are on the green in 2 on a par 4, you can put 2 times to make par and therefore were on the green in regulation.
Green
Green light has a shorter wavelength than red light. Wavelength is inversely proportional to the color of light - shorter wavelengths correspond to higher frequency light like green, while longer wavelengths correspond to lower frequency light like red.
Hitting the green in regulation means your ball is on the green ( not the fringe or rough) In the number of strokes that allows you to two - putt for par . One on a par 5 that's 3 strokes ,on par 4 it is 2 strokes and on par 3 it is 1 stroke
Toronto Green Standard
the apron is the area around the green, the grass in the apron is shorter than the fairway and longer than the green