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Optics and Light Lesson 1
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Curricular Outcomes for Today’s Lesson:
Investigate to determine how light interacts with transparent, translucent, and opaque materials. Classify natural and artificial sources of light as incandescence, fluorescence, phosphorescent, chemiluminescent, or bioluminescent.
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Luminous vs. Non-luminous Objects
Part 1 Luminous vs. Non-luminous Objects
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Luminous Examples: Definition: Light bulb, lightning, sun, candle.
An object that produces light.
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An object that does not produce light.
Non-luminous Examples: Moon, most objects. Definition: An object that does not produce light.
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Transparent, Translucent, and Opaque
Part 2 Transparent, Translucent, and Opaque
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Materials that allow light to pass through freely.
Transparent Examples: Glass, clear plastic. Definition: Materials that allow light to pass through freely.
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Translucent Examples:
Thin or light-coloured fabric, stained glass, coloured plastic, tissue paper, leaf. Defintion: Materials that allow some light to pass through, while some is reflected or absorbed.
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Opaque Examples: Wood, metal, stone, thick or dark-coloured fabric, thick plastic. Definition: Materials that do not allow any light to pass through.
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Part 3 Types of Luminous sources:
Incandescent, Fluorescent, Phosphorescent, Chemiluminescent, and Bioluminescent
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Incandescent Examples: Sun, traditional light bulb, candle.
Definition: Emitting light because of high temperature.
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Fluorescent Examples: Neon sign, fluorescent light bulb/tube.
Definition: Emits light while receiving energy from another source.
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Glow-in-the-dark objects.
Phosphorescent Examples: Glow-in-the-dark objects. Definition: Emitting light for some time after receiving energy from another source.
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Chemiluminescent Examples: Glow sticks, glow bracelets. Definition:
Emitting light because of a man-made chemical reaction.
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Emitting light because of a naturally-occurring chemical reaction.
Bioluminescent Examples: Jellyfish, fireflies. Definition: Emitting light because of a naturally-occurring chemical reaction.
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