A-LevelPhysicsWaves9702/12 · Feb/Mar 2018 · Q251 Mark
The diagram shows a cathode-ray oscilloscope display of an electromagnetic wave. [Figure 25.1] The time base setting is 0.20 µs cm⁻¹. Which statement is correct?
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
AThe frequency of the wave is 2.5 MHz and it lies in the microwave region of the electromagnetic spectrum.
BThe frequency of the wave is 2.5 MHz and it lies in the radio-wave region of the electromagnetic spectrum.
CThe frequency of the wave is 5.0 MHz and it lies in the microwave region of the electromagnetic spectrum.
DThe frequency of the wave is 5.0 MHz and it lies in the radio-wave region of the electromagnetic spectrum.
✓ Correct answer
B: The frequency of the wave is 2.5 MHz and it lies in the radio-wave region of the electromagnetic spectrum.
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