Sound
the speed of sound depends on
temperature and medium it travels through
am instrument's natural set of frequencies at which it vibrates
overtone
A material that reflects or absorbs any light that strikes it is
opaque
a spoon is an example of a __________mirror because it curves inward
concave
a concave lens produces a __________image because the light rays never really meet
virtual
the amount of energy a sound wave carries per second through a certain area is called its ___________
hollow chambers that amplify sound waves
resonates
objects must reflect _____________ in order to be seen
light
what type of image does a plane mirror produce? (think of the basic mirror you use everyday)
virtual and upright
the colored ring of muscle that controls the size of the pupil
iris
loudness is measured in_____________
decibels
music is made of sounds arranged in a regular ___________
pattern
parallel rays hitting a smooth surface
regular reflection
give an example of a convex mirror
security mirrors in a parking garage, grocery store, hospital, curvy roads, and other places
the signals generated by the rods and cones are carried to your brain by the ___________
optic nerve
the pitch of a sound that you hear depends on the sound wave's ______________
frequency
vinyl records store sound in small ___________ etched into the disk
grooves
the bending of light as it enters a new medium
refraction
a __________ is a transparent material with a curved surface that reflects light rays
lens
instrument that uses lenses and mirrors to collect and focus light from distant objects
telescope
the stages of human hearing
1. waves vibrate eardrum
2. bones in middle ear amplify sound wave
3. cochlea sends impulses to brain
4. brain interprets impulses
name 2 uses of sonar
fishing, tracking boats, seafloor mapping, communicating underwater
the angle at which light strikes an object is the angle of ___________
incidence
diffuse reflection
what happens to light rays as they pass through a concave lens?
they diverge, or spread apart