I've searched on Google that aluminium foil can be a thermal insulator, but how does it work?
From my thought process, it should've been a conductor because its a metal, right? But, some said that because its so thin and has large surface area, the heat would be transferred to its environment quickly, hence will cool it.
If I wrap something with an aluminium foil, will it cool that thing that is wrapped? I'm thinking it wouldn't. Yes, it is logical that because its thin and large surface area it will cool it by dissipating the heat quickly, but to where? I'm thinking if I wrap it, it might dissipate it to the inside as well, transferring the heat to the wrapped object also.
Is my thought process wrong? If yes, where? I really need some explanation to this. Thank you very much!!
To anyone who needs more context: So I have this sensor with operating temperature of 70 degree Celsius, and the measured ambient temperature is nearly that value, so I'm thinking that I need to wrap it with something to keep it cool. I have aluminium foil on hand, will it work if I wrap the foil around it to keep it cool? I'm thinking that it will eventually get hot, but will it be cooler in longer duration if I wrap it?