FAQs on Wave Motion & Sound (Part - 4) - Science, Class 9

Question 1

1. What is wave motion?

Accepted Answer

Ans. Wave motion refers to the transfer of energy through a medium by the periodic oscillation of particles in the medium. It involves the propagation of disturbances or waves from one place to another.

Question 2

2. How does a wave transfer energy?

Accepted Answer

Ans. A wave transfers energy by causing particles in the medium to vibrate. As the wave travels, the particles oscillate back and forth, transferring energy from one particle to another. This transfer of energy continues until the wave reaches its destination or loses its energy.

Question 3

3. What is the difference between transverse and longitudinal waves?

Accepted Answer

Ans. Transverse waves are characterized by particles oscillating perpendicular to the direction of wave propagation, while in longitudinal waves, particles oscillate parallel to the direction of wave propagation.

Question 4

4. How does sound travel through a medium?

Accepted Answer

Ans. Sound travels as a longitudinal wave, where particles in the medium vibrate parallel to the direction of wave propagation. When an object vibrates, it creates compressions and rarefactions in the medium, which propagate as sound waves.

Question 5

5. What is the relationship between frequency and pitch of a sound wave?

Accepted Answer

Ans. Frequency is the number of complete oscillations or cycles of a sound wave per second, measured in hertz (Hz). Pitch, on the other hand, is the subjective perception of how high or low a sound is. The higher the frequency of a sound wave, the higher its perceived pitch.

Wave Motion & Sound (Part - 4) - Science, Class 9 Video Lecture

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