Topic: Why Is the Liner of a Thermos Bottle Silvered
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Answers to Common Questions
Why are thermos bottles silvered on the inside?
Heat reflection, like light reflects from a mirror. I personally have never been convinced of the efficiency of the silvered lining. Read More »
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How does the silver surface in a thermos bottle control heat tran...
Some heat exists in the form of molecular kinetic energy, while some of it exists in the form of electromagnetic radiation. The metallic inner surface acts as a mirror to reflect the electromagnetic radiation back into the container. Read More »
Source: http://wiki.answers.com/Q/How_does_the_silver_surface_in_a_thermo...
Why is the liner of a thermos bottle silvered, and why does it ha...
silver colour reflects thermal energy by walls (shiny surfaces have more reflectance, ie, energy lost by absorption is less), hence prevent heat loss by radiation. Vacuum prevents heat loss through conduction and convection, because both th... Read More »
Source: http://answers.yahoo.com/question/index?qid=20090116014145AADtuHX
More Common Questions
Answers to Other Common Questions
Since air is evacuated from the wall of the thermos, the principle mechanism for heat transfer in/out for a cold/hot contents is by infrared radiations through the vacuum. Silver reflects most of that IR before is absorbed by the wall. The ...
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Source: http://answers.yahoo.com/question/index?qid=20100115182532AAFffoS
A mirror-like surface is usually a good reflector not only of visible light, but also of "light" which has wavelengths outside of the visible spectrum. In particular, it's a good reflector of infrared radiation. Infrared radiation is "made ...
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Source: http://answers.yahoo.com/question/index?qid=20080726054930AARHzZL
The inside of a thermos bottle ...
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Source: http://www.chacha.com/question/what-is-the-inside-silver-of-a-the...
The mirror finish in a thermos is to limit the amount of heat transfered in or out by radiation. The gap limits the transfer of heat by conduction. The vacuum within the gap limits the transfer of heat by convection. The mirrored surfaces l...
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Source: http://answers.yahoo.com/question/index?qid=20100208055132AAcahfb
Axe?
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Source: http://answers.yahoo.com/question/index?qid=20111103124940AA9l2Cw
the "vacuum" gap is to reduce conduction heat loss through the walls of the thermos (it's actually not even close to a real vacuum, it's just low pressure air). the metallic film is to block radiation heat losses.
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Source: http://answers.yahoo.com/question/index?qid=20070110230242AAToRQJ
The shiny finish minimises thermal radiation, and the vacuum minimises conduction and convection. Stewart Pinkerton
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