planck's constant
"Planck's constant is like an ideal atom that cannot be split into smaller pieces. In geometric terms, a single quantum of action can be thought ofPlanck's constant is like an ideal atom that cannot be split into smaller pieces. In geometric terms, a single quantum of action can be thought of as a moldable "substance" which can be stretched and twisted but whose overall "volume" is fixed. as a moldable "substance" which can be stretched and twisted but whose overall "volume" is fixed."
The linked essays are worth a read...
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