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isaphttp://webisa.webdatacommons.org/prov/
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Subject Item
isa:291344061
rdf:type
prov:Entity
prov:value
As the ordinates of the aforementioned reflecting points a1, b1 are represented by a1 =(O, 2f) and b1 =(O, -2f), all the light reflected in the reflecting area including the points a1, b1 is considered to emerge through the aperture 103 if at least either of said distance La or Lb satisfies a condition:
prov:wasQuotedFrom
n5:ca
Subject Item
isap:198584555
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isa:291344061