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Your Elvenar Team
Foggy Night in Western Canada
- Thread starter Ashrem
- Start date
mephalia39
Member
SoggyShorts
Mathematician par Excellence
My favorite way to look at the snow in Canada: on my phone while sitting on a beach 1/2 a world away
shimmerfly
Well-Known Member
Beautiful
Ashrem
Oh Wise One
There's plenty of snow, but pictured is rime ice, frost deposits from the fog.My favorite way to look at the snow in Canada: on my phone while sitting on a beach 1/2 a world away
Deleted User - 849411552
Guest
Very elegant! Thank you for posting this beautiful photo.
We've had an unusual amount of snow on the BC westcoast this year. We plan to move to the BC interior next year, so I guess this unusual weather is helping us adapt to our new life.
We've had an unusual amount of snow on the BC westcoast this year. We plan to move to the BC interior next year, so I guess this unusual weather is helping us adapt to our new life.
Ashrem
Oh Wise One
There is fog, but it's a bit thin by that point. And at temps around -10F, it doesn't sit in the air too long, it plates out the second it touches anything, which is why everything in the picture is covered in Rime frost.
If you compare the traffic lights at the end of the street on:
no fog night --------------------------------- vs --------- fog night,
you can see the scattered light of the city in the fog:
quin629
Well-Known Member
If you live in an area with frequent fog you're more likely to be familiar with it. 'Rime' or 'rime frost' is frost that forms when fog freezes on things. Hoar frost is frost that forms when water vapor in air that looks clear directly condenses & freezes onto objects. The crystal formations in the 2 are different.
Ashrem
Oh Wise One
As @quin629 said, Rime frost builds from moisture, usually fog, while hoar frost goes straight from gas to ice. In general, people tend to refer to both rime and hoar frost as hoar frost because they aren't aware of the difference and it's not easy to see by eye if you don't know there's a difference. Rime frost is heavier and can be more dangerous on roads. I would say that up close Rime Frost looks a little bit "fluffier" than hoar frost, which looks lighter and "sharper" to me.
Katwick
Cartographer
In 1724 Daniel Gabrial Fahrenheit defined a temperature scale with:
- The freezing point of a saturated water/salt solution as 0 degrees
- Body temperature as 100 degrees
Equally to the point
- Ice Cubes are hard and clear because they are frozen slowly, which promotes a regular crystalline structure
- Popcicles are Flash Frozen, using liquid nitrogen, and the process is so fast that you can actually see the consequent splinter crystals
Last edited:
Ashrem
Oh Wise One
Again brought up short by being unable to like stuff.
As @Katwick hinted, Fahrenheit got where he did because he he provided something sufficiently accurate and generally useful in the area he worked, early enough on, for it to catch on. In much the same way that most rail gauges around the world continue to be used despite not necessarily being an ideal measure, because they matched what roads were doing before that, probably all the way back to the distance between wheels of Roman chariots, which probably come from a comfortable distance between the rumps of two horses.
Celsius, like other components of International measurement system, are based on easily repeatable conditions so they can always be confirmed by anyone who needs to ensure their experiments are accurate. 0C is the temperature at which pure water freezes at one atmosphere, and 100C is the temperature at which pure water boils at one atmosphere. Anyone intersted in testing can distill water with very basic methods and if they need sufficient accuracy, can go to sea level to do their tests.
Fahrenheit requires a saturated salt solution to set "0" and (since he got body temperature wrong) there is no way to confirm 100F except by comparing to an existing thermometer. The number depend on someone else to provide you with an accurate tool to measure. As soon as one thermometer is wrong, there's no way to find out. if you think you are comparing it to one which is right, and they don't agree, then which is right and which is wrong?
As @Katwick hinted, Fahrenheit got where he did because he he provided something sufficiently accurate and generally useful in the area he worked, early enough on, for it to catch on. In much the same way that most rail gauges around the world continue to be used despite not necessarily being an ideal measure, because they matched what roads were doing before that, probably all the way back to the distance between wheels of Roman chariots, which probably come from a comfortable distance between the rumps of two horses.
Celsius, like other components of International measurement system, are based on easily repeatable conditions so they can always be confirmed by anyone who needs to ensure their experiments are accurate. 0C is the temperature at which pure water freezes at one atmosphere, and 100C is the temperature at which pure water boils at one atmosphere. Anyone intersted in testing can distill water with very basic methods and if they need sufficient accuracy, can go to sea level to do their tests.
Fahrenheit requires a saturated salt solution to set "0" and (since he got body temperature wrong) there is no way to confirm 100F except by comparing to an existing thermometer. The number depend on someone else to provide you with an accurate tool to measure. As soon as one thermometer is wrong, there's no way to find out. if you think you are comparing it to one which is right, and they don't agree, then which is right and which is wrong?