OPAQUE: COMPLETELY BLOCKING LIGTH FROM PASSIN THROUGHT.
TRANSPARENT: LETTING SO LIGHT THROUGHT,SO THAT OBJCTS ON THE OTHER SIDE CAN BE SEEN CLEARLY.
TRANSLUCNT: LETTING ONLY SOME LIGTH THROUGHT, SO THAT OBJECTSON THE OTHER SIDE APPEAR BLURRY.
POLARIZATION: ALLOWING LIGHT VIBRATIONS TOPASS THROUGHT IN ONLY ONE DIRECTION.
REFRACTION: THE BENDING OF LIGTH RAYS AS THEY PASS FROM ONE SUBSTANCE INTO ANOTHER.
CONVEX LENS: A LENS THAT CURVES OUTWARD AND BRING LIGTH RAYS TOGETHER.
CONCAVE LENS: A LENS YHAT CURVES INWARD AND SPREAD LIGTH RAYS APART.
