a back-and-forth movement of matter

the number of vibrations per second

not allowing light to pass thought

the bending of light moves from one material to another

allowing only some light to pass thought

the bouncing of heat or light off an object

a lens that is thicker at the edges than it is at the center

a lens that is thicker at the center than it is st the edges

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alicia325

Term	Definition
vibrations	a back-and-forth movement of matter
pich	how high or low a sound is
volume	the loudest of sound
frequency	the number of vibrations per second
opaque	not allowing light to pass thought
refraction	the bending of light moves from one material to another
transparent	allowing only some light to pass thought
reflection	the bouncing of heat or light off an object
concave lens	a lens that is thicker at the edges than it is at the center
convex lens	a lens that is thicker at the center than it is st the edges