- Periodic Waves
- Transverse periodic Waves
- Phase Relationship between two Points on a Wave
- Longitudinal Periodic Waves

- Binomial Theorem
- Speed of Sound in Air
- Laplace's Correction
- Effects of Various Factors on Speed of Sound in Air
- More on Effects of Various Factors on Speed of Sound in Air
- More on Effects of Various Factors on Speed of Sound in Air
- Problem on Effects of Various Factors on Speed of Sound in Air

- Stationary waves in a Stretched String
- More on Stationary waves in a Stretched String
- Problem on Stationary Waves in Stretched String

- Stationary Waves in Air Columns
- More on Stationary Waves in Air Columns
- Problem on Stationary Waves in Air Columns

- Doppler Effect
- Doppler Effect: When Source at Rest, Observer is Moving
- Doppler Effect: When Observer at Rest, Source is Moving
- Doppler Effect: When both Source and Observer ae Moving
- Problem on Doppler Effect
- Applications of Doppler Effect
- More on Applications of Doppler Effect
- More on Applications of Doppler Effect