Waves 0.0 / 5 ? PhysicsWavesGCSEAQA Created by: 2015irvineCreated on: 12-05-18 16:27 What do waves do? Transfer energy from one place to another without transferring matter 1 of 32 What is amplitude? Maximum displacement of a wave from its undisturbed position 2 of 32 What is wavelength? The distance from one point of one wave to the same point on the adjacent wave 3 of 32 What is frequency? The number of complete waves passing a point in a second 4 of 32 What is frequency measured in? Hertz (Hz) 5 of 32 What is Wave speed measured in? m/s (metres per second) 6 of 32 What is wavelength measured in? m (metres) 7 of 32 What is the formula to find the time period of a wave? t = 1/f (time period = 1 divided by frequency) 8 of 32 What are mechanical waves? Vibrations that travel through a medium 9 of 32 Give three examples of a mechanical wave? Sound, Water waves and Seismic P-waves 10 of 32 What are electromagnetic waves? Travel at the speed of light through a vacuum 11 of 32 Give three examples of an electromagnetic wave? Radio waves, x-rays, microwaves 12 of 32 What is a transverse wave? Vibration is at a right angle to the direction of energy transfer 13 of 32 What is a longitudinal wave? Vibration is parallel to the direction of energy transfer 14 of 32 What is a normal? A line at 90 degrees to the boundary 15 of 32 What is the angle of incidence? The angle between the normal and the incident ray of light 16 of 32 What is the angle of reflection? The angle between the normal and the reflected ray 17 of 32 The angle of incident and reflection are ???? for a plane mirror Equal 18 of 32 What are the qualities of an image in a plane mirror? Upright, Laterally inverted, virtual and the same distance behind the mirror as infront 19 of 32 Sound travels through ?????? causing ?????????? in the ????? solids, vibrations, solid 20 of 32 The human ear can detect a range of ????????? ranging from ???? to ??????? Frequencies, 20hz, 20,000hz 21 of 32 Sound is a ??????? type of wave Mechanical 22 of 32 Why is the human hearing range limited? Conversion of sound waves to vibrations in a solid can only work in a limited frequency range 23 of 32 What can ultrasound be useful for? Detection of structures/objects that cannot be seen by the eye 24 of 32 Why can ultrasound not be heard by humans? The frequency of the sound waves are much too high above our hearing range 25 of 32 How does ultrasound work? It creates echoes and can help detect structures or depths 26 of 32 What is the formula for finding the depth of something using ultrasound? depth = 0.5 x wave speed x time for echo to return 27 of 32 Seismic waves are produced by ?????????, the types of seismic wave are ?-?????, ?-????? and ?-????? Earthquakes, P-waves, S-waves ,L-waves 28 of 32 State the properties of a P-wave Longitudinal, Travel through solids and liquids, are the fastest of seismic waves 29 of 32 State the properties of a S-wave Transverse, Travel through solids only, slower than P-waves 30 of 32 State the properties of a L-wave Slowest of seismic waves, Move the Earth's crust in all directions 31 of 32 How do seismic waves provide evidence for the structure and size of the Earth's core? Because of the waves being absorbed or refracted. 32 of 32
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