Which row, A, B, C or D, is true for sound waves travelling through air?
| Transmission | Type | Speed in air | |
|---|---|---|---|
| A | Transmit energy from detector to source | Transverse | Travel at different speeds for different frequencies |
| B | Transmit energy from detector to source | Longitudinal | Travel at approximately the same speed for all audible frequencies |
| C | Transmit energy from source to detector | Transverse | Travel at different speeds for different frequencies |
| D | Transmit energy from source to detector | Longitudinal | Travel at approximately the same speed for all audible frequencies |
Row A
Row B
Row C
Row D