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Comments to #8
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Party 4 year s ago
The green light in a traffic signal also has a little blue in it so red/green colorblind people can tell the difference between the red light and the green light.
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Skeleton 4 year s ago
...#4 I highly doubt, that when they started shuffling giant red and green dots on the sticks - few hundred yrs ago anyone had a clue about all that BS. Same goes for the ship's starboard and port navigation lights - so u need to find better explanation.
Soccer balls
When soccer balls started to be made out of plastic, they were bleached all white. However, the company Adidas decided to also add black to them. Black and white balls were easier to spot on TV because at that time, the pictures on TV were black and white as well.
3
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Party 4 year s ago
The green light in a traffic signal also has a little blue in it so red/green colorblind people can tell the difference between the red light and the green light.
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Skeleton 4 year s ago
...#4 I highly doubt, that when they started shuffling giant red and green dots on the sticks - few hundred yrs ago anyone had a clue about all that BS. Same goes for the ship's starboard and port navigation lights - so u need to find better explanation.