Question

: What if Planck’s constant was zero?

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Answer 1

Answer:

:

A: Setting -

to zero is a way of taking the classical limit of quantum mechanics: the

uncertainty principle goes away, and in that limit quantum mechanics becomes more

or less equivalent to Newtonian mechanics. However, Planck’s treatment of black

body radiation suggests that a universe in which Planck’s constant was zero would

be very different than ours, because hot objects would rapidly radiate away all their

energy as high-frequency electromagnetic radiation (the ultraviolet catastrophe),

matter would be extremely cold, and the universe would be dominated by light.

Answer 2

Answer:

A smaller Planck's constant would allow atoms to be smaller, due to smaller quantum uncertainties. If Planck's constant were zero, there would be no quantum effects - everything would be continuous and smooth, fully predictable in the Newtonian sense.

When Planck's constant goes to zero inside, the surface boundary becomes a perfect mirror - no energy can fall inside it if energy is to be conserved. By the same token, nothing can emerge from the bubble. And we might not exist.