Question
The diagram shows wavefronts of a water wave passing through a gap in a barrier.
Which change will increase the diffraction of the wave as it passes through the gap?
- Increase the amplitude of the wave.
- Increase the width of the gap.
- Reduce the depth of water.
- Reduce the frequency of the wave.
Answer/Explanation
Ans:
D
Question
A large hill blocks the direct path between a transmitter of radio waves and a receiver, as shown
The receiver picks up the signal from the transmitter even though the radio waves do not travel through the hill.
Which row is correct?
Answer/Explanation
Ans:A
Question
A water wave passes into a region where the wave travels more slowly.
As it passes into the slow region, what happens to the frequency and what happens to the wavelength of the wave?
| frequency | wavelength |
A | decreases | remains the same |
B | increases | remains the same |
C | remains the same | decreases |
D | remains the same | increases |
Answer/Explanation
Ans: C
Question
The diagrams show examples of wave motion.
Which waves are longitudinal?
A 1 only
B 2 and 3 only
C 2, 3 and 4
D 2 and 4 only
Answer/Explanation
Ans: D
Question
A wave of frequency 6600 Hz travels 1320 m in 4.0 s.
What is the wavelength?
A 0.050 m
B 0.80 m
C 1.3 m
D 20 m
Answer/Explanation
Ans: A