Waves Flashcards
what type of wave is a sound wave
longitudinal
How is height measured in a transverse wave
from middle to top or middle to bottom
Does sound travel fastest in warm or cold air
warm air
what does sound travel fastest in
solids, liquids, warm gas, cold gas
Refraction occurs when a wave changes _____ as it passes through a different medium
speed
Houses with carpet are much quieter than houses with tile or hardwood floors because the sound waves
are absorbed
Increasing the amplitude of a sound wave will make it
get louder
what does amplitude measure
energy
when an ambulance with its siren on is moving AWAY from you, the wavelength gets ___ and the pitch of the sound gets ____
longer, lower
In order for reflection to occur the wave must ___ an object
bounce off
Light waves travell fastest in a ___
vaccum
X-rays, UVwaves, and sound waves all have what in common
transmit energy
If the angle of incidence shown is 30 degrees, the angle of reflection is___
30 degrees
Refraction occurs when a wave changes its___
speed
An echo is an example of a sound wave because of
relection
the angle of incidence of a wave is always equal to the angle of____
reflection
The po9int between vibrations in a standing wave is a
node
What is interference
when 2 or more waves overlap and combine to form a new wave
the amount of time it takes 1 wavelength to pass a point
period
what does T mean
period
what is frequency
the number of waves that pass by a certain point in 1 second
frequency and wavelength have what type of relationship
inverse
what is Sound an example of and why
mechanical wave and longitudinal
because mechanical waves have to travel through a medium
what is electromagnetic and why
light waves/transverse waves.
becuase it does not need a medium to travel through
like you can see light in space but you can not hear sounds in space.
A measure of how long the waves is, taken from one wave to the same point on the next wave.
wavelength
what is loudness?
the human perception of intensity
A term related to frequency that increases as frequency increases
pitch
what is refraciton
the bending of waves causes by a change in their speed as they move from one medium to another
Ex-
like fish in water when it is distorted
when an object causes a wave to change direction and bend around it
diffraction
What are tuning forks an example of? Explain
Resonance. process where an object is made to vibrate at it’s NATURAL FREQUENCY
In what way does matter move in a longitudinal wave
paralell
In what way does matter move in a transverse wave
perpendicular
Order the electromagnetic spectrum
Longest wavelength/smallest frequency- Smallest wavelength/highest frequency
Radio Waves, Microwave, infrared, visible light, ultraviolet, x-ray, gamma ray
electromagnetic waves can behave as waves and ____; called photons
particles
what do radio waves do?
MRI’s, WIFI, RADAR, cell phones
what do microwaves do?
Cooking, doppler radar and Gps
What is used in night vision goggles and remotes
infrared
what is visible light?
the only EM waves we can see. ROYGBIV
What is used to kill bacteria and what else can it do?
ultraviolet(UV) waves. it can also be used in lightbulbs and is used in the human body to make vitiman D
what is bad for humans if we use too much of it
UV
what do X-rays do?
Take pictures of bones. small enough to penetrate skin. Overexposed can cause cancer
Gamma Rays. Explain
used to kill cancer cells, sterilize materials, and radioactive tracers, make big bombs and kill all kinds of cells
what is the doppler effect?
Change in frequency and pitch due to a moving wave source.
what are rods?
like night vision, used in low levels of light
what are cones?
used to see in the day time. bright light levels. used to see colors
Concave lenses?
nearsighted (to help you see closer)
Convex lenses?
Farsighted ( to help you see far away)
mechanical waves___
disturb matter
what is UV produced by?
stars and galaxies
