Wavelength for harmonic on string
A fixed string in a standing-wave string practical of length \(0.85\,\text{m}\) vibrates in harmonic \(n=3\). Calculate the wavelength. Enter the numerical result and choose the interpretation that matches the wave physics.
Worked practice: physics data and result
Read the physical quantities first, then calculate the result and state what it means.
Write a full answer
Now write the response in full, in your own words — this is what the exam asks for. The AI marks it on the same moves you built above (focus, evidence, technique, judgement) and gives feedback on reasoning, evidence, and expression.