Question

When a sound wave travelling from one medium enters another medium, then the quantity that changes is :

• A. velocity and wavelength but not frequency
• B. wavelength and frequency but not velocity
• C. frequency only
• D. neither velocity nor frequency nor wavelength

Answer 1

The correct option is A velocity and wavelength but not frequency

When a sound wave travelling from one medium enters another medium, then the quantities that changes are velocity and wavelength. Frequency does not change. Option 'A' is correct.