P11 Waves

Transferring matter

vibrations that travel through a substance Sound waves Water waves Seismic waves

Waves hat can travel through a vacuum at the same speed of 300000 kilometers per second Light waves radio waves and microwaves

Waves where oscillations move perpendicular to the direction in which the waves are moving All electromagnetic waves are transverse waves

When an object vibrates in air it males the air around it vibrate as it pushes and pulls in the air The oscillations are along the direction in which the wave travels The oscillations of a longitudinal wave are parallel to the direction in which the waves transfer energy

The maximum displacement of a point on the wave from its undisturbed position The bigger the amplitude the more energy the waves carry

The distance from a point on the wave to the equivalent point on the adjacent wave Eg the distance from one wave crest to the next wave crest

The number of waves per second

The time taken for each wave to pass a fixed point

When the wavefront moves away from the barrier at the same angle to the barrier as the incident wavefront

When a wave changes direction in which they are travelling when they cross a boundary between one medium and another Plane waves directed at a non zero angle to the boundary change direction as they cross the boundary

When as wave crosses a boundary it experiences a change in speed and direction while part of the wave that still hasent crossed the boundary still moves in the same direction at the same speed but still have the same frequency

Any object vibrating in air makes the layer of air near the object pushes and pulls repeatedly on yhr air