Sound + light Flashcards
(23 cards)
Transverse wave
Particles travel up and down- light waves
Longitudinal waves
Particles travel back and forth- sound waves
What does sound travel fastest in
Solids
What does sound travel slowest in
Gases
What can sound not travel in
A vacuum
What is the amplitude
Loudness
What is the wave length
The gap between
What is frequency
The pitch= shorter wave length is higher frequency
What do waves transfer
Energy NOT MATTER
What do you measure frequency in
Hertz
What happens in refraction
When light goes from a less dense medium to a more dense medium it bends towards the normal
When light goes from a more dense medium to a less dense medium the light bends away from the normal
What does the lens do
It refracts / bends the light
What does the cornea
It protects the eye and focuses light
What is the iris
Controls how much light can be let in through the pupil
Retina
The back of eye/ where light is / where image is formed
Optical nerve
Sends the signals to brain
What colour light would a red object absorb/ reflect
Reflect red light and absorb all the other colours
Does sound or light travel quicker
Light
What is the range human hearing
20-20000 hertz
Equation of speed
Speed=distance/time
Order of particles in ear
Object vibrates, air vibrates, ear drum vibrates, ear bone vibrates, hairs vibrate in cochlea, auditory nerve sends message to brain
What is the speed of sound
330m/s
What is angle of incidence
Angle of reflection
