# Light Travels in Straight Lines

Recognise that light appears to travel in straight lines and use this to explain how we see objects and why shadows have the same shape as the objects that cast them

Builds on: How We See Objects (hard, https://ai.page/c/how-we-see-objects/en.md), How Shadows Form (hard, https://ai.page/c/how-shadows-form/en.md), Wave Behaviour Vocabulary (hard, https://ai.page/c/wave-behaviour-vocabulary/en.md)

Concept id: light-travels-in-straight-lines. Subject: science. Licence: CC BY-SA 4.0.

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