5.3.16 identify materials that light passes through and materials that block light, 5.5.16 explain that light will travel in a straight line until it strikes an object, which may alter the path (e.g., reflection from a mirror, refraction from a lens.)
(it; strikes; an object, which may alter the path (e.g., reflection from a mirror, refraction from a lens) (an object; may alter e.g.; the path) (materials that light passes through and materials; block; light)
it an object materials that light passes through and materials
strikes may alter e.g. block
an object, which may alter the path (e.g., reflection from a mirror, refraction from a lens
the path
light