Longitudinal waves are best exemplified by

Question

Accepted Answer

C. {'text': 'Sound waves in air', 'label': 'C'}

1. Longitudinal waves have particle motion parallel to wave direction.
2. Sound waves are longitudinal in fluids (air, water) due to compressions and rarefactions.
3. Waves on a string are transverse (perpendicular motion).
4. EM waves are transverse (E and B perpendicular to propagation).
_Source: NCERT Class 11 Physics, Ch 14 "Waves", §14.2_

Answer

{'text': 'Waves on a string', 'label': 'A'}

Answer

{'text': 'Electromagnetic waves', 'label': 'B'}

Answer

{'text': 'Water surface waves', 'label': 'D'}