science revision waves Flashcards
What movements does a transverse wave have?
up and down movements
what angles are transverse waves to the direction of energy
right angle
what do waves transfer?
energy
name 2 types of waves
longitudinal or transverse
if a wave hits a surface it __________
reflects
reflection causes the direction of the wave to
change
all waves can be reflected. True or false?
true
the crest is the ______ part of the wave
highest
the trough is the ______ part of a wave
lowest
the displacement is how _____ a point on the wave is from the middle line
far
the ______ is the maximum displacement
amplitude
what is amplitude
distance from the middle of the waves to the crest or trough
No need to answer:
if two waves meet, their displacements combine very briefly. this is superposition. the waves carry on as they were after.
You can do it!
if two ________________ meet the height of each wave is added together so the crest ______
- identical crests
2. doubles
if two ________________ meet the depth of each wave is added together so the trough depth ______
- identical troughs
2. doubles
DONT ANSWER!!!
if one wave is at a crest and the other is at a trough you subtract the depth from the height so the crest and trough will be smaller and may cancel out leaving a flat surface.
keep going !
what’s the law of reflection
angle of incidence= angles of reflection
what’s the equation for finding speed/distance/time
speed= distance/time
longitudinal waves have ________ that are _________ to the direction of the wave. they are also parallel to the direction of energy
- vibrations
2. parallel
give 2 examples of longitudinal waves
slinky and sound waves
