Question

For sound wave in air, the vibrations are
A) Electromagnetic
B) Longitudinal
C) Transverse
D) None of the above

Answer 1

- Hint: The vibrations of the particles are best described as longitudinal. Longitudinal waves are waves in which the motion of the individual particles of the medium is and direction that parallel to the direction of energy transport.

Complete step-by-step solution -

Sound waves in air and any fluid medium a longitudinal wave because particles of the medium through which the sound is transported vibrate parallel to the direction that the sound wave moves.

Vibrating string can create longitudinal waves. As a vibrating string moves in the forward direction, it begin to push up on surrounding air molecules, moving them to the right to earth's nearest neighbors the air molecules to the right of the string to be compressed into a small region of space .Aspirating string moves in reverse direction leftward, it lower the pressure of air immediately to its right, thus causing air molecules to move back lift word. The lower pressure to the right of the stream causes air molecules in that reason immediately to the right of the string to expand into a large region of space. The back and forth vibration of string causes indivisible air molecules in a region immediately to the right of a string to continuously vibrate back and forth horizontally .The molecules move right word as the stream of right word and then left whereas the string moves left toward. This back and forth vibration is imported to adjacent particles by particle to particle interaction. Other surrounding particles began to move forward and send give you to write since their molecular moving in the direction that is parallel to the direction that the wave moves, the sound wave reflected as a longitudinal wave.

Note: If a sound wave is moving from left to right through air, the particle there will be displaced both right and left word as energy of the sound wave passing through it the motion of the particle is parallel to the direction of energy transport. This is what is characterized as a sound wave in air is a longitudinal wave.