Question

: A list of mediums given below
i) Wood
ii) Water
iii) Air
 iv) Vacuum
In which of these mediums can travel?
ii) and iii) only
i), ii) and iii) only.
iii) only
iii) and iv) only

Answer 1

Hint we are provided with a list of mediums. To find out the mediums in which sound can travel, we should know the suitable condition for the propagation of sound and about the factors affecting the propagation of sound.

Complete step by step answer
Sound is produced through the vibration of particles. Vibration is defined as the periodic back and forth motion of particles when force is applied. While moving back and forth the particles bump into each other and produce sound. These particles result in a formation of mechanical waves known as sound waves. Sound is measured in frequency.
Sound is a sequence of waves of pressure that propagates through compressible media like air liquid and solid. During the propagation of sound waves the waves are refracted, reflected and altered by the medium by which it travels.
Sound travels through a medium, it cannot travel in vacuum because there is no matter in vacuum to vibrate front and back vacuum is an empty space. So the vacuum sound cannot be heard.
Sound can travel through solid liquid and gas molecules. The sound waves travel through the medium by vibrating the particles in the medium, so every material that is made up of atoms and molecules can act as a medium for sound to travel.
From the above statement we can say that the sound can travel through wood air and water that are listed in the question since it has particles to vibrate. And cannot travel through the vacuum since it has no particle or matter to vibrate.

Hence the answer is option (B) i), ii) and iii) only.

Note The sound cannot travel through vacuum because of this only we cannot hear the sound in space, in space everyday there are collisions between asteroids, meteoroids and stars explodes but we didn’t hear a single sound.