defence exam Agniveer Vayu Group X & XY Mock Test 01/2026 Physics Waves Supersonic Speeds, Shock Waves
Ultrasonic, infrasonic and audible waves travel through an air medium with speeds νu, νi, νa respectively, then
1
νu ≤ νi = νa
2
νu = νi = νa
3
νu ≥ νi ≥ νa
4
νu ≤ νi ≤ νa