Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
41 Cards in this Set
- Front
- Back
Name three different types of wave |
light sound waves on water seismic waves |
|
What property of a wave does the wavelengthdescribe? |
the distance from one wave to the same place onthe next wave |
|
units for wavelength |
metres |
|
What property of a wave does the frequencydescribe? |
the number of waves per second |
|
units for frequency |
Hertz |
|
What is transferred by a wave? |
energy & information |
|
What does amplitude mean? |
the height of a wave themaximum displacement of a particle from its rest position |
|
direction do the particles in a sound wave movecompared to the direction the wave is travelling |
Parallel - backwards and forwards in the same direction asthe wave |
|
What word is used to describe waves like soundwaves? |
longitudinal |
|
What word is used to describe waves like thewaves on water? |
transverse |
|
Name a type of transverse wave |
waves on water, some seismic waves, light waves |
|
Name a type of longitudinal wave |
sound, some seismic waves |
|
What is the difference between longitudinal andtransverse waves? |
the direction the particles move compared to thedirection the wave is travelling |
|
What word describes the number of waves persecond? |
frequency |
|
What word describes the time taken for one waveto pass? |
period |
|
What word describes the distance between a pointon one wave and the same point on the next wave? |
wavelength |
|
Nameone thing that waves do not transfer. |
matter |
|
What is the difference between speed and velocity? |
velocity has a direction as well as a magnitude |
|
What is the equation that links speed, distance and time? |
speed = distance/time |
|
What is the equationthat links wave speed, frequency and wavelength? |
wave speed = frequency × wavelength |
|
What two things do you need to measure to findthe speed of a wave? |
either the time to cover a certain distance OR the wavelength and the frequency |
|
Describe the path of light when you watch TV |
TV to eye |
|
Describe the path of light when you situnderneath a lamp and read a book |
lamp to book to eye |
|
What is the word that describes light bouncingoff a material? |
reflection |
|
What does refraction mean? |
changing the direction of a wave |
|
When does refraction happen to light waves? |
when light goes into or out of a material |
|
Name three materials that light can travelthrough |
any three transparent materials, such as air,glass, water, Perspex |
|
Why is it difficult to see the exact positionsof objects on the bottom of a swimming pool? |
light is refracted as it leaves the water |
|
What is an interface? |
boundary between two materials |
|
What is a normal line? |
a line at right angles to a surface/ interface/ boundary |
|
Describe the path of a light ray in air. |
straight line |
|
What happens to light when it goes from air to glass? |
refracts/changes direction HIGHER changes speed |
|
When light goes from air to glass, which way does it bend? |
towards the normal |
|
When light goes from water to air, which way does it bend? |
away from the normal |
|
What does transmit mean? |
when a wave passes through something |
|
What does reflect mean? |
when a wave bounces off something |
|
HIGHER In which material does lighttravel faster, water or air? |
air |
|
HIGHER What happens to the speed ofwaves as they go into shallower water? |
slow down |
|
What is the word used to describe a wave bouncing off a barrier? |
reflection |
|
What is the word to describe a wave changing direction as it crossesa boundary? |
refraction |
|
SEPARATE What is absorption? |
when a wave disappears as it reaches a boundary |