Sound And Waves

Question 1

Transverse wave

Answer 1

The direction in which the energy travels is perpendicular to the direction of vibration of the particles of the medium

Question 2

Speed of a wave

Answer 2

c = f x wavelength

Question 3

Longitudinal wave

Answer 3

The direction of the energy travels parallel to the direction of the vibration of the particles of the medium

Question 4

Diffraction

Answer 4

Diffraction is the spreading of a wavefront into a geometrical shadow when it passes through a gap or around an obstacle

Question 5

Constructive interface

Answer 5

Gives a wave of greater amplitude

Question 6

Destructive interface

Answer 6

Give a wave of smaller amplitude

Question 7

Doppler effect

Answer 7

The apparent change in the frequency of a wave due to the relative motion between source and observer

Question 8

Pitch

Answer 8

Frequency of a sound

Question 9

Quality

Answer 9

Number and intensity of harmonics (overtones) present

Question 10

Loudness

Answer 10

Amplitude of the vibration of the sound wave

Question 11

Characteristics of waves

Answer 11

Pitch
Quality
Loudness

Question 12

Resonance

Answer 12

The transfer of energy between two bodies of the same natural frequency

Question 13

Sound intensity

Answer 13

Sound intensity is the sound energy per second per unit area

Question 14

Wavelength

Answer 14

Distance between to successive crests (metre)

Question 15

Frequency

Answer 15

Number of complete oscillations made by a point in one second

Question 16

Amplitude

Answer 16

The maximum displacement of a particle of a medium from its mean position