# GCSE Physics

 What are waves Waves are vibrations that transfer energy from on place to place without without matter being transformed Waves have Amplitude ,wavelength and frequency Waves can be either Transverse or longitudinal Transverse waves have Sideways vibrations the vibrations are perpendicular to the direction of energy transfer of the wave Tarnsverse waves include Light and all other electromagnetic waves Ripples on water Waves on strings A slinky spring wiggled up and down Longitudinal waves have Vibrations along the same line In longitudinal waves the vibrations are parallel to the direction of energy transfer of the wave Examples of longitudinal waves are Sound waves an ultrasound Shock waves eg seismic waves A slinky spring when you push the end Transverse , longitudinal or both The wave carriers energy from one place to another Both Transverse , longitudinal or both The substance it travels through does not travel with the the wave Both Transverse ,longitudinal or both The waves cause regular disturbances Both Transverse , longitudinal or both The waves causes peaks and troughs in the substance Transverse Transverse , longitudinal or both The wave stretches and compresses the substance Longitudinal The amplitude is the Displacement from the rest position to the crest (or trough) Wavelength is the f Full cycle of the wave e.g. from crest to crest Frequency is t The number of complete waves passing a certain point per second or the number of waves produced by a source per second . Frequencybis measured in Hertz (Hz) 1Hz is 1 wave per second All waves can be Reflected refracted or diffracted Reflection of light lets us See things ReflectionReflection of light is what allows us to see things light bounces off them into our eyes . When light travelling in the same direction reflects from an uneven surface such as a piece of paper , the light Reflects off at different angles When light travelling in the same directionreflects from an even surface (smooth and shiny like a mirror) then it's all Reflected at the same angle and you get a clear reflection What is the normal It is an imaginary line that is perpendicular to the surface at the point of incidence (where the light hits the surface) The law of reflection is The angle of incidence = the angle of reflection AuthorAnonymous ID150683 Card SetGCSE Physics DescriptionPart one Updated2012-04-28T17:01:25Z Show Answers