frequency of infrasound & ultrasound
Asked by indrayani | 22nd Jan, 2010, 05:07: PM
We cant hear infrasound &ultrasound, similarly we can not here , see, sense somany phyical relities like nuclear dadiation, X rays ,gamma rays etc. Based on observable effect by these things onacn deduce its presence.
One can indirectly see/observe the waves through acientific instruments.
Answered by | 22nd Jan, 2010, 08:10: PM
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