Are Units Fundamental in Physics? Exploring Duff's Theory

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In summary, Duff argues that elementary units do not physically exist and that dimensionful physical constants are ultimately expressions of the units we choose to use. He also suggests that Nature does not care about the units we use and that it is meaningless to talk about variations in dimensionful parameters, but meaningful to detect variations in dimensionless parameters.
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http://iopscience.iop.org/1126-6708/2002/03/023
Duff claims that elementary units physically does not exist. It is easy to imagine that a kilogram, a meter and a second are all expressed in one unit, for instance second. But it is not easy to imagine, how to calculate without use of any unit?
Are here any examples?
 
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here's another link to the same paper:
http://xxx.lanl.gov/abs/physics/0110060

and this is another paper from Duff about essentially the same issue.
http://arxiv.org/abs/hep-th/0208093

Duff is not saying anything about units, per se. what he is saying is that dimensionful physical constants are not fundamental but, ultimately, expressions of the units we choose to express these constants with. and that Nature doesn't give a rat's a$$ what units humans (or whatever other intelligent being) decides to use for units.

Duff is saying that it is operationally meaningless in physics to talk of variation of dimensionful parameters such as [itex]c[/itex] or [itex]G[/itex] or [itex]\hbar[/itex] or [itex]\epsilon_0[/itex] or [itex]k_B[/itex] (all these physical constants go away when Planck units are used) but it is meaningful to detect a variation in dimensionless parameters such as [itex]\alpha[/itex] or [itex]m_p/m_e[/itex].
 

FAQ: Are Units Fundamental in Physics? Exploring Duff's Theory

What is the Imagination of Duff's theory?

The Imagination of Duff's theory is a scientific theory proposed by Dr. John Duff that explores the role of imagination in the creative process and how it relates to human cognition.

How does Duff's theory explain the connection between imagination and creativity?

According to Duff's theory, imagination is a cognitive process that allows individuals to generate new and original ideas by combining existing knowledge and experiences in novel ways. This process is essential for creativity, as it enables individuals to think outside the box and come up with innovative solutions.

Does Duff's theory have any practical applications?

Yes, Duff's theory has several practical applications in fields such as education, psychology, and business. It can be used to enhance creative thinking skills, improve problem-solving abilities, and foster innovation in various industries.

How does Duff's theory differ from other theories of imagination?

Duff's theory differs from other theories of imagination in its emphasis on the role of cognition and the creative process. Unlike other theories that focus solely on the mental images produced by imagination, Duff's theory highlights the importance of cognitive processes such as memory, perception, and reasoning in imagination.

What evidence supports Duff's theory?

Duff's theory is supported by a growing body of research in fields such as cognitive psychology, neuroscience, and education. Studies have shown that imagination plays a crucial role in creativity and that individuals with strong imaginative abilities tend to be more creative and innovative. Additionally, brain imaging studies have revealed that the same neural networks involved in imagination are also activated during creative tasks.

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