The intensity, I, of a sound wave is inversely proportional to the square of the distance, d, from the source and directly proportional to the square of the amplitude, A.
At distance d from the point source of a sound wave, the amplitude of the wave is 6 A.
What is the amplitude at a distance of 3 d?
2 A
3 A
6 A
The diagram shows a cross-sectional view through a water wave travelling from left to right.
At which point is the water moving with maximum speed in the upward direction?
The table below contains the frequencies of various parts of the electromagnetic spectrum.
Which row correctly describes X as infrared and Y as X-rays?
|
X |
Y |
|
|
A. |
3 × 105 Hz |
3 × 1020 Hz |
|
B. |
3 × 1010 Hz |
3 × 1016 Hz |
|
C. |
3 × 1018 Hz | 3 × 1014 Hz |
|
D. |
3 × 1014 Hz |
3 × 1019 Hz |
The diagram shows a wave with a frequency of 25 Hz travelling from left to right.
At this particular instant in time, the displacement from the equilibrium position of point X is zero.
What is the shortest time to elapse for the displacement of point Y to be zero?
0.005 s
0.01 s
0.05 s
0.10 s
The graphs below show the displacement of a wave as a function of time and position.
What is a correct expression for wave speed?
The graph shows the displacement, x, of a wave pulse as a function of distance, d.
Which graph correctly shows the displacement of the wave pulse as a function of time, t?
The star Deneb emits EM waves of wavelengths 500 µm, 5 µm, 0.5 µm and 0.005 µm.
Which row correctly identifies the areas of the EM spectrum to which these wavelengths belong?
|
500 µm |
5 µm |
0.5 µm |
0.005 µm |
|
|
A. |
Microwave |
Infrared |
Visible |
Ultraviolet |
|
B. |
Radio |
Microwave |
Infrared |
Visible |
|
C. |
Infrared | Visible | Ultraviolet | X-ray |
|
D. |
Microwave |
Infrared |
Ultraviolet |
Gamma |
Visible light has wavelengths ranging from 400 nm to 700 nm.
What is the maximum frequency of visible light?
3 × 10−18 Hz
7.5 × 10−18 Hz
3 × 10−16 Hz
7.5 × 10−14 Hz
The diagram shows the positions of three points on a string as a transverse wave travels along it from left to right.
Which row correctly shows the velocities of the points on the string?
|
1 |
2 |
3 |
|
|
A. |
↓ |
↓ |
↓ |
|
B. |
↑ |
↑ |
↓ |
|
C. |
↑ | ↓ | ↑ |
|
D. |
↓ |
↑ |
↓ |
The diagram below shows a water particle on the crest of a wave in a ripple tank.
Which arrow correctly shows the force acting on the particle?
