Light and Shadows Interactive Simulation

Shadows form when an opaque object blocks light. In this lamp–object–screen model, similar triangles give shadow height = object height × screen distance / object distance. Moving the object towards the lamp enlarges its shadow on the screen; moving it towards the screen shrinks it. A wider lamp produces a softer edge. Students can change distance from light and object height and compare what happens. Use it for physics inquiry with Grades 3–4, Middle School, and High School on a projector or student device.

ស្តង់ដារ៖ NGSS MS-PS4-2

• How moving the object towards the lamp enlarges its shadow on the screen
• Why a taller object always casts a proportionally larger shadow
• Reading the similar-triangles relationship from the ray diagram
• How puppeteers use shadow geometry to control puppet size

1. 1Predict how changing distance from light will affect the shadow length, then test the prediction.
2. 2Use evidence from the interactive visual to explain the result.

សំណួរដែលគ្រូតែងសួរ