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 th visible spectrum blue and violet light are shorter than green. x-rays are way shorter than green.
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.
Toronto Green Standard
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
the apron is the area around the green, the grass in the apron is shorter than the fairway and longer than the green
The wavelenght of blue light is shorter than green light.
Red light has the longest visible wavelength, so any other color has a shorter one.