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1750 lm - PowerPoint PPT Presentation

Light

Light. Chapter 16 & 17. What is light?. Usually we think of only visible light but visible light is just a part of the electromagnetic spectrum. Light sources: sun, flames, sparks, fireflies, glow sticks. Lamps. LEDs, lasers, TV etc., If there is NO light in a room you cannot see anything.

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1750 lm - PowerPoint PPT Presentation

Light