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Lesson 3
Light and sound
📖 Lesson
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🎯 Quiz — pick the translation
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✅ Lesson done
Light is a wave travelling at 300,000 km/s. Split it with a prism — you get a rainbow. Sound is air vibrating: the drum shakes → the ear hears.
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Spectrum
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Light source
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Shadow
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Reflection
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Refraction
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Seeing
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Test yourself!
Quiz — pick the translation →
🖨 Worksheet
Practice the topic with the trainer — like after class