Physics · Lesson Worlds

Waves: interactive science lab

Change the pulse rate and prove that frequency packs the ripples closer.

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What will you learn?

Frequency is how often the pulse comes. Higher frequency, shorter distance between crests. Amplitude is height — it does not set the spacing.

How does the lab work?

Observe the simulation, make a prediction, change a variable, run the experiment, and explain the result. Finish with a challenge that tests your understanding.

You can change: Frequency, Height. Compare what happens and connect the result to the scientific explanation.

Try a comparison in Waves

Start with the lab’s initial settings. Choose one control below, predict the result, and change that control while keeping the others fixed. Record the setting and what you observe before making a second change.

Frequency: the lab starts at 0.8 Hz; its available range is 0.4–2.4 Hz.
Height: the lab starts at 16; its available range is 8–28.

For a named starting condition, try Slow, Steady, Quick. A preset can change several settings: check the controls before treating two presets as a one-variable comparison.

Questions to discuss during the activity

Watch what happens. Each pulse sends a crest. The next pulse sends another. Watch the ripples leave the pebble.
Name the cause. If pulses come faster, crests pack closer. That closer packing is a shorter wavelength. The height of each crest is amplitude — a different knob. Frequency is how often a crest is born.
Change something. Raise frequency and you should see more, tighter ripples. Change frequency, then pulse.
Guess before you run. If we raise frequency toward 2 Hz, the ripples will… Guess what will happen, then run to check.

After your comparison, explain how the observations connect to this idea: Frequency is how often the pulse comes. Higher frequency, shorter distance between crests. Amplitude is height — it does not set the spacing. Name one condition you held fixed and one feature of the real world this model simplifies. A completed run is a starting point for discussion, rather than proof of mastery.

Who is it for?

Curious learners exploring physics. A parent or teacher can help younger learners read the instructions and discuss the results. Choose by topic and prior knowledge rather than a fixed grade level.

Is this lab free?

Yes. This interactive lab is free without signing in or a paid membership.

No app download is needed; interactive play requires JavaScript and a modern browser.

Use this activity with a learner

Families and educators · choose by prior knowledge

Learning goal: Frequency is how often the pulse comes. Higher frequency, shorter distance between crests. Amplitude is height — it does not set the spacing.

Before you begin: Read the controls for Frequency, Height. Make one prediction before changing a setting.

Check understanding: Ask for one observation, the evidence that supports it, and a question to investigate next.

A simulation simplifies the real world. Explain which conditions stayed fixed; a successful run alone does not demonstrate mastery.

Compare the shape and motion of waves: prediction, evidence, and follow-up

Share Waves with your family or class. No account is needed to open the free resource.

Activity and guide by Lesson Worlds. About the platform.

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