A shiny teapot reflects more heat back into itself due to its smooth surface, while a dull teapot absorbs more heat due to its rough surface. This means the shiny teapot retains heat better and stays hotter compared to the dull teapot.
A shiny silver teapot has higher reflectivity, which means it reflects more heat back into the teapot, keeping the contents hotter for longer. A dull brown teapot absorbs more heat, leading to quicker cooling of the tea inside.
Bromine is a dull, dark red-brown liquid at room temperature. It has a slightly shiny appearance when in its liquid state, but it quickly evaporates into a reddish-brown gas, which is not shiny.
Iron is typically dull and lusterless in its natural state. When exposed to moisture or air, iron can also develop a reddish-brown layer of rust, further diminishing its shine.
dull
Dull?
A shiny silver teapot has higher reflectivity, which means it reflects more heat back into the teapot, keeping the contents hotter for longer. A dull brown teapot absorbs more heat, leading to quicker cooling of the tea inside.
The shiny metal teapot reflects heat back in on itself and has a lower thermal mass than a brown china teapot so it stays hot longer. I have tried this by wrapping a copper can with aluminum foil and spraying an identical copper can with matte black paint. Filling both with the same amount of boiling water and adding thermometers I took readings every minute for about 20 minutes It became clear that the shiny can's water stayed about 4 degrees C hotter than the heat radiating black can. Case solved!
Bromine is a dull, dark red-brown liquid at room temperature. It has a slightly shiny appearance when in its liquid state, but it quickly evaporates into a reddish-brown gas, which is not shiny.
Iron is typically dull and lusterless in its natural state. When exposed to moisture or air, iron can also develop a reddish-brown layer of rust, further diminishing its shine.
dull
shiny
It is shiny.
Shiny
dull
Dull?
High purity must be shiny, but if oxidized it will become dull
It could be dull or shiny. It doesn't matter.