1 markThe following statements are about waves.
1 | Waves can travel through free space |
2 | Waves can be polarised |
3 | Waves have a frequency inversely proportional to their wavelength |
4 | Waves have an intensity proportional to their amplitude |
Which ones would apply to both sound and light waves?
3 only
4 only
1 and 4
1 and 2
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1 markUltraviolet waves have an order of magnitude of the frequency of the longest-wavelength of 10x Hz.
What is the value of x ?
19
17
16
13
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1 markWhich of the following statements shows that sound waves are longitudinal?
sound is diffracted around corners
sound is refracted as it passes from hot air to cold air
sound cannot be polarised
sound can be reflected from a solid surface
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1 markFig 1.1 shows a longitudinal wave.
Fig. 1.1
Which label correctly shows the wavelength of a longitudinal wave?
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1 markWhich pair contains one transverse and one longitudinal wave?
A. | Water wave | Visible light |
B. | X-ray | Ultrasound |
C. | Primary (P) wave | Sound wave |
D. | Infrared wave | Vibration on a guitar string |
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1 markSound travels with a speed of 330 m s–1 in air. The variation with time of the displacement of an air particle due to a sound wave is shown below.
Which of the following statements about the wave is correct?
the wavelength of the sound wave is 1.32 m
the graph shows that the sound is a transverse wave
the frequency of the wave is 500 Hz
the intensity of the wave will be doubled if its amplitude is increased to 0.4 mm
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1 markA wave is travelling through a medium at 24 m s–1 with a frequency of 15 Hz.
What is the phase difference between two points 2 m apart?
They are out of phase by half a cycle.
There is no phase difference.
They are out of phase by a quarter of a cycle.
They are out of phase by 0.8 of a cycle.
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1 markWhat is the frequency, amplitude and period of the wave shown in the graph below, to 2 significant figures?
| Period / s | Frequency / Hz | Amplitude / m |
A B C D | 0.0042 0.0035 0.0031 0.0027 | 240 290 320 290 | 0.013 0.0065 0.013 0.0065 |
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1 markThe graph shows the displacement of a sound wave over time.
When the intensity of the wave is halved, which graph shows the correct displacement of the wave ?
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1 markThe graph shows two waves P and Q.
Wave P has an amplitude of 8 cm and a frequency 100 Hz.
What is the amplitude and the frequency of wave Q?
| Amplitude / cm | Frequency / Hz |
A B C D | 4 4 2 2 | 300 33 300 33 |
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1 markThe graph below shows two sound waves, the sound wave is a series of moving pressure variations.
Wave 1 has an intensity of 1.6 × 10–6 W m–2, what is the intensity of wave 2 ?
3.6 × 10–6 W m–2
2.4 × 10–6 W m–2
3.0 × 10–6 W m–2
4.5 × 10–6 W m–2
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1 markFig 1.1 shows a displacement-distance graph of a transverse wave at t = 0 s. The wave is travelling at 64 ms-1.The wave is travelling at 64 ms-1. Particle R is marked at a position of 0.2 m.
Fig. 1.1
What would be the phase difference between the position of Particle R at t = 0 s and t = 0.034 s?
7.0°
49°
100°
260°
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1 markA source emits a sound wave and moves away from an observer at a speed of 85 m s-1. Fig 1.1 shows the displacement-distance graph of the sound wave at the source.
Fig. 1.1
What is the observed frequency of the sound wave?
The speed of sound, v = 340 ms-1
1300 Hz
1400 Hz
1700 Hz
2100 Hz
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1 markFig 1.1 shows two longitudinal waves, wave A and wave B, over time t. Wave A has an intensity of IA.
Fig. 1.1
Assuming both waves have equal amplitude, what is the intensity of wave B?
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