Which of the following statements are true for wave motion? (a) Mechanical transverse waves can propagate through all mediums. (b) Longitudinal waves can propagate through solids only. (c) Mechanical transverse waves can propagate through solids only. (d) Longitudinal waves can propagate through vacuum.

Q. State true or false :
Mechanical Waves are waves which propagate through a material medium.

Q. Explain why (or how):
(a) in a sound wave, a displacement node is a pressure antinode and vice versa,
(b) bats can ascertain distances directions, nature and sizes of the obstacles without any "eyes"
(c) a violin note and sitar note may have the same frequency, yet we can distinguish between the two notes,
(d) solids can support both longitudinal and transverse waves, but only longitudinal waves can propagate in gases, and
(e) the shape of a pulse gets distorted during propagation in a dispersive medium.

Q. Which of the following statements are true for wave motion?

With propagation of longitudinal waves through a medium, the quantity transmitted is