for a cooling glass? black should not be used for anyhing needed to be cool/cold. black is designed to absorb all light and reflect non of it. hence the color black. as such anything inside would be warmer by nature.
a white/clear glass is designed to reflect a near optimum amount of light and absorb little meaning the item inside remains colder longer.
The name of the dense volcanic glass that is typically black in color is obsidian.
The rock you are describing is likely obsidian. Obsidian is a naturally occurring volcanic glass formed during rapid cooling of lava. It is usually black in color and has a smooth, glassy texture.
To get better cooling because of Black Body radiation effect whihc is highest.
Obsidian is a type of black glass.
Cooling fins on a refrigerator are typically thin, metallic and silver or gray in color.
Obsidian, a naturally occurring volcanic glass, is naturally black in color.
The darkest igneous rock is basalt, which is usually dark black or dark gray in color. It forms from the rapid cooling of lava on the Earth's surface, resulting in its fine-grained texture and dark appearance.
No, heating and cooling does not effect the strength of a glass
cooling glass
They can be green, yellow, brown, black, or clear/colourless.
will appear black
The cooling fins are painted black to improve heat absorption, as black color absorbs heat more efficiently than other colors. The rough surface increases surface area, which helps in dissipating heat more effectively, making the cooling process more efficient.