Ask Questions, Get Answers

Home  >>  JEEMAIN and NEET  >>  Physics  >>  Class11  >>  Oscillations

The motion of the sea waves when wind is blowing uniformly can be considered as:

a.       Random motion b.      Simple harmonic motion c.       Combination of a number of simple harmonic motions  d.      None of the above

1 Answer

Motion of sea waves through it may look random it is actually a combination of number of SHMs of different frequency & amplitude.
These waves have been studied characterized by their power spectnal density (PSD) as a function of frequency.
The PSD is nothing but square of max acceleration divided by a small frequency sample in which acceleration is assumed to be constant.
This is a meat means of representing such seemingly random phenomenon.
This technique is used to describe wind velocities which are gusty, the vibrations experienced in a motor car, aeroplane, etc.
answered Dec 10, 2013 by meena.p

Related questions