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Ch 21 vocab test

Orden de Palabras:
CRESTS
ELECTROMAGNETIC
ILLUMINATED
INCIDENCE
INCIDENT
LUMINOUS
MICROWAVES
NORMAL
OPAQUE
PENUMBRA
PHOTONS
POLARIZED
QUANTA
QUANTUM
REFLECTION
SHADOW
SPECTRUM
TRANSLUCENT
TRANSPARENT
TROUGHS
UMBRA
UNPOLARIZED