Vocabulary
Image is right side up and smaller than object.
Convex Mirror
What produces sound waves?
Vibrations
What occurs when a light wave changes speed?
Refraction
Both sound and light waves travel through matter, but only light waves travel through
A Vacuum
layer of tissue with light-sensitive cells
retina
how high or low a sounds seems to be
pitch
A sound wave is a series of compressions and
rarefractions
Light cannot pass through it.
Opaque Materials
used in magnifying tools and cameras
convex lenses
amplifies sound
Middle Ear
a narrow beam of light
light ray
The decibel is used to measure a sound’s
loudness
Image of object is reversed left to right.
Plane Mirror
a reflected sound wave
echo
converts vibrations to nerve signals
Inner Ear
any reflecting surface
mirror
something that forms an image of an object (not a mirror)
lens
Allows only some light to pass through.
translucent material
Sound waves with a greater frequency have a higher
pitch
collects and channels sound waves into the ear
Outer Ear
____________ differ according to their wavelength
Electromagnetic Waves
Sound waves are produced by what
Vibrations
thinner in middle than on their edges
Concave Lenses
allows all light through it
Transparent Materials
controls amount of light that enters the eye
Iris