What is a wave?

  • A
    $A$ physical movement of matter from one place to another.
  • B
    $A$ disturbance in a medium due to repeated periodic motion of particles about their mean position,transferring energy without the actual net transport of the medium.
  • C
    The random motion of particles in a vacuum.
  • D
    $A$ stationary state of matter where particles do not move.

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Similar Questions

$(a)$ What is meant by intensity of sound?
$(b)$ Mention the conditions for an echo to be heard clearly.
$(c)$ $A$ ball is dropped into a pond from a height of $44.1 \, m$. The splash of sound is heard $3.13 \, s$ after the ball is dropped. Determine the velocity of sound in air.

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If $20$ waves are produced per second,what is the frequency in hertz (in $, Hz$)?

Give one example each of natural vibration,forced vibration,and resonance.

What is an echo? When can we distinctly hear the echo of a sharp sound? Why cannot we hear an echo in small halls?

Represent graphically by two separate diagrams in each case:
$(i)$ Two sound waves having the same amplitude but different frequencies.
$(ii)$ Two sound waves having the same frequency but different amplitudes.
$(iii)$ Two sound waves having different amplitudes and also different wavelengths.

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