A trough is the low point of a transverse wave., A photon is a particle of light; a tiny bundle of energy, Electromagnetic waves transfer energy through empty space., Rays are straight lines that show the direction of light. , Crests are the high points of transverse waves., Refraction is when light passes through a medium., Mechanical waves transfer energy through matter., Reflection is when light bounces off a medium., Amplitude is the height of a transverse wave., Echoes are caused by reflected sound waves., Wave speed is the distance a wave travels per unit of time., Waves are disturbances that transfer energy., Frequency means the number of complete waves passing a point in a given time. , Longitudinal waves cause the particles of a medium to move back and forth., Oscillation means moving back and forth at a regular speed., When light disappears in a medium and is converted to another form of energy it has been absorbed., We measure wave frequency in hertz., A medium is any matter that mechanical waves can travel through., Light is a form of electromagnetic energy. , Light is made up of streams of photons., Transverse waves vibrate at right angles.,

Light & Waves

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