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: Light is a '''radiation''' that can [[Energy Transfer|transfer energy]] from one [[Energy Store|energy store]] to another.
: Sound is a form of '''radiation''' that [[Energy Transfer|transfers energy]] by pressure waves through a [[solid]], [[liquid]] or [[gas]]eous [[medium]].
==Key Stage 4==
===Meaning===
'''Radiation''' is an [[Energy Transfer|energy transfer]] that spreads the [[energy]] by [[wave]]s starting from a central point.
''NB: '''Radiation''' should not be confused with [[Ionising Radiation]]. Most '''radiation''' is harmless. [[Ionising Radiation]] is extremely dangerous.''
===About Radiation===
: '''Radiation''' can [[Energy Transfer|transfer]] [[energy]] through a [[medium]].
: The [[Energy Transfer|energy transferred]] by '''radiation''' increases with the [[intensity]] of the '''radiation'''. Loud [[sound]]s [[Energy Transfer|transfer]] more [[energy]] than quiet [[sound]]s. Bright [[light]] [[Energy Transfer|transfers]] more [[energy]] than dim [[light]].
: '''Radiation''' can be harmful depending on the [[intensity]]. The greater the [[intensity]] the more harmful it can be.