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Introduction
This section introduces waves and wave motion.
What do these things have in common?
âthe sounds we hear
âthe warmth we feel from the sun
âthe motion of electrons inside atoms.
Answer: we can analyse them all in the same wayâby using the language and physics of waves.
There are four main classes of waves: mechanical waves (such as sound and waves on strings), electromagnetic waves (such as light), gravitational waves, and matter waves (such as electron motion in atoms).