|[http://www.textbooksonline.tn.nic.in/Books/Std08/Std08-III-MSSS-TeM-3.pdf Tamilnadu Textbook Class - VIII - Chapter - 15 - Light and Sound Page No 148-167]e
+
|[http://www.textbooksonline.tn.nic.in/Books/Std08/Std08-III-MSSS-TeM-3.pdf Tamilnadu Textbook Class - VIII - Chapter - 15 - Light and Sound Page No 148-167]
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===Karnataka Science Class IX Text Books => TamilNadu Science Text Books in Telugu===
===Karnataka Science Class IX Text Books => TamilNadu Science Text Books in Telugu===