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Critical angle
Meaning
Noun
●
In Optics:
The
angle of incidence
beyond which
light
traveling
through a
medium
experiences
total internal reflection
upon
encountering
a
boundary
with a less
refractive
medium
.
●
In Aviation:
The
angle of attack
beyond which an
airfoil
stalls
,
experiencing
a
decrease
in
lift
and increase in
drag
due to
separation
of
airflow
from the
upper
surface
of the
airfoil
.
●
In Architecture:
The
angle
beyond which a
ramp
or a set of
stairs
is considered
uncomfortable
or unsafe.
Sourced from
Wiktionary
Synonyms
Alpha Max
Stall Angle
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