LIGHT REFLECTION: ONLINE IGCSE PHYSICS CLASS Light waves obey the properties of reflection.  The diagram above shows the properties of reflection.  Lightwave obeys the law of reflection:- The incident ray, normal and reflected ray all lay on the same plane An incident angle equal to the reflected angle List.

SOUND: ONLINE IGCSE PHYSICS CLASS In this chapter, we will be  Discovering properties of sound waves We will be investigating the waveform of sound waves, amplitude and frequency We will be talking about echoes Review some questions A sound is a form of a wave. Sound waves are a.

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