Physics (AS & A Level) · May / June 2021 · Paper 13 · Question 27

To produce a stationary wave, two waves must travel in opposite directions through the same space. Which statement about the properties of the two waves must also be correct?

1. AThe waves must have equal frequencies, but different speeds and wavelengths.
2. BThe waves must have equal speeds, but different wavelengths and frequencies.
3. CThe waves must have equal speeds, frequencies and wavelengths.
4. DThe waves must have equal wavelengths, but different speeds and frequencies.

As printed in the paper