class 11 physics notes pdf chapter 10 – student friends pdf September 26, 2020September 26, 2020 by admin class 11 physics book – chapter 10 – Oscillations of Waves (दोलन एवं तरंग ) – student friends click here to download – class 11 physics chapter 10 pdf – Oscillations of Waves (दोलन एवं तरंग)