question_answer

Ultrasonic, Infrasonic and audible waves travel through a medium with speeds \[{{V}_{u}},\,{{V}_{i}}\] and \[{{V}_{a}}\] respectively, then [CPMT 1989]

A)            \[{{V}_{u}},\,{{V}_{i}}\] and \[{{V}_{a}}\] are nearly equal

B)            \[{{V}_{u}}\ge {{V}_{a}}\ge {{V}_{i}}\]

C)            \[{{V}_{u}}\le {{V}_{a}}\le {{V}_{i}}\] 

D)            \[{{V}_{a}}\le {{V}_{u}}\] and \[{{V}_{u}}\approx {{V}_{i}}\]