Light & Seeing in the Dark
Observe that objects in darkness can be seen only when illuminated by a light source
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Light & Seeing in the Dark means seeing that we need a light source to see objects — darkness hides them until light reaches them. We will practise once together, then check a fresh example.
Spend about 12 minutes comparing dark vs lit views of one object, naming light sources, then checking a fresh example.
Explain illumination and reflection, with an optional safe observation rather than forced darkness.
Explain illumination and reflection, with an optional safe observation rather than forced darkness.
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Start practiceLight & Seeing in the Dark practice
Explain why light sources make objects visible.
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Learning resources
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PhET Interactive Simulations · Practice link — not the full lesson
Color Vision
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Color Vision supports hands-on exploration for Light & Seeing in the Dark. Not every lab worksheet.
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Before you openAsk the learner what they changed in the sim or page and what they observed.
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Source, access and review notes
Public PhET Interactive Simulations page. An anonymous GET on 2026-11-12 returned HTTP 200 with no login or payment prompt for this URL. Opening the link does not save practice or assess mastery. An adult should preview and guide the learner.
PhET Interactive Simulations. “Color Vision.” External page; Gakuva does not copy, host, embed, or redistribute materials.
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Check understanding
- Explain that we need light to see objects — without any light source, it is completely dark
- Describe an observation showing objects become visible only when light reaches them
- Distinguish between light sources (sun, torch, lamp) and objects that just reflect light
“If you go into a completely dark room with your child, can they explain why they can't see anything until a torch is switched on?”
Curriculum record
- Type
- Conceptual
- Subject
- Science
- Domain
- Waves, Light & Sound
- Age range
- Ages 6–10
Standards