the-
of
outcome
the-
focal-
inverse
the
the-
of
The
is
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effective
this
of-
inverse
and
the
the.
new
lens
the,
power
value
focal
is
result
the-
length
between
and
is
is
difference
The-
dioptric-
length.
the-
out
vertex
this
distances
add
From
answer-
