Shadow size depends on the object's height and its distance from the light. Moving an object closer to the light makes the shadow smaller; moving it farther makes the shadow larger. Taller objects always cast longer shadows.
Object 8 cm tall, 30 cm from light → shadow 4.8 cm
About this simulation
This free Shadows Interactive simulation lets students change the inputs and watch the model respond in real time. Built for physics lessons, it runs in any browser with no signup and is ready for the projector or 1:1 devices.
What students can explore
- Adjust each control and see how it changes the shadows interactive model.
- Read the live formula as your numbers are substituted in.
- Compare predictions before and after you change a value.
Is the Shadows Interactive simulation free?
Yes. This Shadows Interactive simulation is completely free, with no signup and no download required — open it in any browser.
What grades is the Shadows Interactive simulation for?
It works across grade levels — run it on a projector for younger classes, or let older students explore the controls and readouts on their own devices.
Embed this simulation
Drop it into your LMS, blog, or class site — free, no sign-up.
<iframe src="https://kiwibee.io/en/simulations/shadows-simulation/embed" width="800" height="520" loading="lazy" allowfullscreen></iframe>