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Planck length
Meaning
Noun
●
In Physics:
A
unit
of
length
,
believed
to be the
scale
at which
quantum gravity
effects become significant, that is
defined
in terms of
the
speed of light
, the
gravitational constant
and the
reduced
Planck's
constant
, namely: ℓ_P=√hbar Gc³≈1.616 252(81)×10⁻³⁵
mbox
meters
Sourced from
Wiktionary
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