MCQ
The waves which propagate in metals are:
- ALongitudinal
- BTransverse
- ✓Both $(a)$ and $(b)$
- DNone of these
✓
Answer
Correct option: C.
Both $(a)$ and $(b)$
In solids, there are two kinds of acoustic waves -- longitudinal [the medium is vibrating in the direction of the acoustic wave] and transverse [the medium is vibrating at right angles to the direction of propagation]. The speed of sound is greater for longitudinal waves. The trend in the speed of sound is: the harder the material and the lower density - the faster is the speed of sound.
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