Is it practically possible to construct a closed system?

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A closed or isolated system is theoretically challenging to achieve in practice. While a vacuum may limit energy transfer from the outer atmosphere, it does not eliminate thermal radiation from the system itself. Thermal radiation emitted by surfaces can still affect the system's energy balance. Additionally, electromagnetic radiation, such as sunlight, can travel through a vacuum without needing a medium. Ultimately, a perfectly isolated system is not feasible due to these energy transfer mechanisms.
VishalB95
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In practice, is a closed or isolated system possible?
My friends keep saying No, but isn't a system inside say, a vacuum isolated?
There is no outer atmosphere for transfer of energy to take place.
 
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VishalB95 said:
In practice, is a closed or isolated system possible?
My friends keep saying No, but isn't a system inside say, a vacuum isolated?
There is no outer atmosphere for transfer of energy to take place.
No, you can't have a perfectly isolated system. In the case of a vacuum, thermal radiation will be emitted by the inner surface of the vacuum chamber and reach the system that way. The most obvious (and important for humans!) example of this is the sun.
 
How can radiation be transmitted without a medium??
 
VishalB95 said:
How can radiation be transmitted without a medium??
How does sunlight reach Earth? There's a vacuum between the Earth and the sun. Electromagnetic radiation does not require a medium.
 
Aaah yeah! Thanks
 

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