Transverse and Longitudinal Waves Compared

Lab Brief #6

🎯 Your mission

Run the experiment. Find out what really happens.

⚡ The twist

Nature loves to surprise the careful watcher.

What you'll learn

In a transverse wave the particles move at right angles to the travel direction; in a longitudinal wave they move along it, making compressions and rarefactions. Light is transverse, sound is longitudinal, and only the first can be polarised.

Key words

compression
A region of a longitudinal wave where particles are bunched together.
polarisation
Restricting a transverse wave's oscillation to one plane; impossible for longitudinal waves.

Make a hypothesis first

Before you start: write down what you think will happen, and why.

Say your guess out loud — then find out if you were right.

Get ready

🧰 What you need

slinky spring
two polarising filters

⚠️ Safety first

Hold both ends of the slinky and keep it away from faces.

Step 1 of 4 · Read

Think about what you just learned: say what "compression" and "polarisation" mean in your own words before you start.

Step 2 of 4 · Do

Produce both wave types on a slinky and sketch each, marking the oscillation direction against the travel direction. Then look through two polarising filters and rotate one to show light is transverse.

Step 3 of 4 · Observe

Record what actually happened, including anything that did not match what you expected.

Step 4 of 4 · Record

Write a conclusion that answers the question this lesson opened with, and state your uncertainty.

Question 1 of 2

Which wave type can be polarised?

How sure are you?😐 maybe

Question 2 of 2

Compressions and rarefactions are features of:

How sure are you?😐 maybe

Mind = blown

🔬 The more you look, the more nature shows you.

Nice work!

You got 0 of 2 right.

Next: The Electromagnetic Spectrum and Its Risks All lessons

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✨ More to explore

🌍 Where you see this in real life: This shows up in your everyday life more than you'd think.

🏆 Stretch challenge (try it this week): Try one experiment in real life this week — even a tiny one.

👨‍👩‍👧 For the dinner table: “What's the most surprising thing you learned today?”

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Transverse and Longitudinal Waves Compared

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Transverse and Longitudinal Waves Compared

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