Longitudinal waves are best exemplified by
A{'text': 'Waves on a string', 'label': 'A'}
B{'text': 'Electromagnetic waves', 'label': 'B'}
C{'text': 'Sound waves in air', 'label': 'C'}
D{'text': 'Water surface waves', 'label': 'D'}
Answer & Solution
Correct 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_
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