- #1
Unbeatable1621
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Are all arrows of time special cases of the thermodynamic one? The arrows of time I am referring to are the psychological arrow of time and the cosmological arrow of time. Thanks.
Are all arrows of time special cases of the thermodynamic one?
- Thread starter Unbeatable1621
- Start date
Instead, it appears to be a fundamental feature of the universe. The other arrows of time, such as the radiative, causal, particle physics, quantum, and quantum source of time, are all special cases of the thermodynamic arrow of time. This means that they are all related to the flow of energy and the increase of entropy.
- #2
anorlunda
Staff Emeritus
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Why don't you start reading here, then come back to PF if you have questions.
https://en.wikipedia.org/wiki/Arrow_of_time said:
- #3
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In short, the psychological arrow of time is a consequence of the thermodynamic one. The cosmological arrow of time isn't.
1. What is the thermodynamic arrow of time?
The thermodynamic arrow of time refers to the concept that in any physical process, the total entropy (or disorder) of a closed system will always increase over time. This means that the direction of time is determined by the increase of entropy, and not by any other factor.
2. How does the thermodynamic arrow of time relate to other arrows of time?
The thermodynamic arrow of time is considered to be the most fundamental arrow of time, as it is based on the laws of thermodynamics and applies to all physical processes. Other arrows of time, such as the psychological or cosmological arrows, are considered to be special cases of the thermodynamic arrow.
3. Are there any exceptions to the thermodynamic arrow of time?
There are some rare cases where the entropy of a system may decrease over time, but these are considered to be temporary and do not violate the overall principle of the increase of entropy. Additionally, the thermodynamic arrow of time only applies to closed systems, so open systems may not follow this principle.
4. How does the thermodynamic arrow of time relate to the concept of causality?
The thermodynamic arrow of time is closely related to the concept of causality, as it is based on the idea that the direction of time is determined by cause and effect. The increase of entropy is seen as the effect of past events, and the direction of time is seen as the cause of future events.
5. Can the thermodynamic arrow of time be reversed?
In theory, the thermodynamic arrow of time could be reversed if the entropy of a closed system were to decrease over time. However, this would require a highly improbable and unlikely scenario, as it would go against the fundamental laws of thermodynamics. In practical terms, the thermodynamic arrow of time is irreversible.
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