How do fish hide in clear waters?

Hey dead - optic , having trouble spearfishing ? Find out why you ’ll almost never arrest a fish by aiming directly for it .

The universal speed limit is the speed of brightness level . Although the speed of light is treat as a constant , the pragmatic stop number of illumination is exchange by the metier through which it move around . That is — in a void — light can haul ass at around 300,000,000 metre per second , while travel through denser material have it to slow down .

How does this help a fish make you reckon really stupefied when you ’re spearfishing like Tom Hanks in Castaway ? Refraction . Light bends when it moves from one textile to another .

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Imagine you ’re driving a car along a road — when all of a sudden — some cryptical force slows down the unexpended front steering wheel . The car veers to the left wing . If they were to slow down the veracious front rack , the elevator car would veer to the rightfulness . ( At this point a diabolical phonation should make out on the radiocommunication and warn you that unless you play along , it will steer you into a tree . I ’m pretty certain this does n’t find to light , but I ’ll have to brush up on the subject to be confirming . )

The greater the change of the brightness ’s direction , the farther the fish really is from where you think it is . Human beings are used to illumine that travel in straight line . If you usurp that sparkle from underwater is unbowed you will be ‘ seeing ’ the fish in a whole dissimilar spot than it really is .

This is how a brute with a tiny little Pisces the Fishes brain can routinely hide in extensive daylight in light water . With experience , it ’s possible to aline your perception until you could get a in effect sense of where fish are – for example , the fixed food aisle of a local grocery storage . Just do n’t bring your shaft in there . People get very overturned .

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