Waves Ch6 Flashcards
what are the two types of waves
- longitudinal: direction of the wave is the same as the amplitude
- transversal: direction of the wave is different than the amplitude
draw a longitudinal wave diagram
should include:
- multiple state lines
- compression
- rarefactor
- wavelength
- amplitude
draw a transversal wave diagram
should include:
- waves
- peak
- trough
- wavelength
- amplitude
what is the amplitude
the distance form the peak or trough of a wave to it’s point of rest
what is the wavelength
the distance from one point on a wave to the same point in the next wave
what is frequency
waves per second
what is the unit to measure frequency
hertz : meters/ second
what is the equation for speed in a wave diagram
speed= frequency x wavelength
V=f x λ
what are the seven levels of frequency
- radio
- microwave
- infrared
- visible light
- ultrasound
- X-ray
- gamma rays
what is reflection
waves reflected at the same angle that they strike in
what is refraction
waves change direction and speed when traveling a different medium
what is diffraction
- waves bend around an object
- when passing through a gap, the greatest diffraction occurs if it’s the size of the wavelength is the same or smaller
what are the properties of sound waves
- to make sound they need a vibrating object
- need a medium to travel
- travel faster through denser material
- can be reflected, refracted and diffracted
what is an echo
reflection of sound against a flat surface
what is the equation for the speed of normal sound and the speed of an echo
normal:
speed= distance travelled/ time taken
echo:
speed= distance x2/ time
