Light–Object–Screen Shadow 3D Interactive

This interactive is a 3D simulation of light, an object, and a screen that helps learners explore how shadows are formed. It shows a light source shining toward an object placed in front of a screen, allowing students to see how the object blocks light and creates a shadow.

What the interactive demonstrates

Light travels in straight lines.
An opaque object blocks light and forms a shadow on a screen.
The size, shape, and position of the shadow depend on the relative positions of the light source, object, and screen.
Different 3D objects can produce different shadow shapes.

What learners can explore

Move the light source and observe how the shadow changes.
Change the position of the object relative to the light and screen.
Investigate how the shadow becomes larger or smaller when distances are changed.
Visualise the relationship between object shape and projected shadow in 3D.

Learning value

This interactive helps students build a stronger understanding of shadow formation, rectilinear propagation of light, and spatial relationships in optics. Because the model is animated and interactive, students can make predictions, test them immediately, and refine their understanding through inquiry.

Suggested classroom use

Teachers can use this simulation for demonstrations, guided inquiry, or student exploration. It is useful for prompting questions such as: “What happens to the shadow when the object moves closer to the light?” or “Why does the shadow size change when the screen is moved?”

Interactive link:
https://iwant2study.org/lookangejss/04waves_13light/ejss_model_Light_Object_Screen_Shadow_3D_animate/index.html

Additional Resources

Explore more related light simulations and teaching resources:

https://sg.iwant2study.org/ospsg/index.php/interactive-resources/physics/04-waves/04-light