Answer the following:
$(i)$ Can transverse waves travel in gases?
$(ii)$ Can longitudinal waves travel in solid,liquid as well as gas?
$(iii)$ At any instant,a compression is formed at a point. After how much time $(a)$ a rarefaction $(b)$ a compression will be formed at the same point?

(N/A) $(i)$ No,transverse waves cannot travel in gases because gases do not have the property of rigidity (shear modulus is zero).
$(ii)$ Yes,longitudinal waves can travel through solids,liquids,and gases because they rely on pressure variations and density changes.
$(iii)$ Let $T$ be the time period of the wave:
$(a)$ $A$ rarefaction will be formed at the same point after a time interval of $T / 2$.
$(b)$ $A$ compression will be formed at the same point after a time interval of $T$.