To Refract

<h1 class="pagetitle" style="font-size: 20px; margin: 0px 0px 5px; font-family: sans-serif; letter-spacing: normal;">science<span class="topic" cat="physics" style="font-family: Verdana, Geneva, sans-serif; font-size: medium; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-caps: small-caps; color: blue;"><span class="neutral" style="font-variant-caps: normal; font-variant-numeric: normal; font-variant-east-asian: normal; color: black;">,&nbsp;</span><span class="topic" style="font-variant-numeric: normal; font-variant-east-asian: normal;">physics</span></span><span class="def" style="font-family: Verdana, Geneva, sans-serif; font-size: medium;">&nbsp;to change the direction of light or sound, for example when light goes from the air into a liquid or through a transparent substance</span></h1>