MCS-PHYSICS-9B
Home work: Chapter SOUND 18th April,2020 Dear Students, I hope you have completed the first homework. I am giving you notes which have to be done in continuation to the previous homework. Characteristics of Sound wave. 1. Compressions and Rarefactions : Compressions are the regions where medium particles are crowded together and the density as well as pressure are high. On the other hand Rarefactions are the regions where medium particles are spread apart and the density as well as pressure are low. 2. Amplitude : The magnitude of maximum disturbance (pressure or density) in the medium on either side of the mean value is called amplitude of sound wave. Amplitude is usually represented by the symbol A. The SI unit of Amplitude of sound is Metre(m). 3. Wavelength : The Distance between two consecutive compressions or two consecutive Rarefactions is called Wavelength. It is usually repr