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atoms

Light. Oscillating electric fieldMatching oscillating magnetic fieldFrequency range varies widelySpeed of waves are constant. Interaction of Light with Matter. Microwave oven (water rotation)IR heat lamps (warm food)Radio waves (communication)Visible (sight)X-rays (medical). Simple Light Calculations.

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atoms

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    1. Atoms Chapters 8

    3. Interaction of Light with Matter Microwave oven (water rotation) IR heat lamps (warm food) Radio waves (communication) Visible (sight) X-rays (medical)

    4. Simple Light Calculations FM Radio = 95 MHz = 95x106 Hz Wavelength = 3.16 m AM Radio = 1410 KHz = 1410x103 Hz Wavelength = 213 m Visible Light = 8x1014 Hz Wavelength = 3.75x10–9 m = 375 nm

    5. Matter is made of Atoms Small objects 10-10 m diameter 1025 in your body Building blocks Different types

    6. History Greeks (Earth, Air, Fire, Water) Alchemists About 25 common types of elements Change lead into gold Dalton

    7. Changes to Atomic Models Thomson, Rutherford, Bohr Charges, nucleus, orbits

    8. Can we see them? Brownian motion Atomic force microscopy

    9. Bohr Atom Electrons orbiting nucleus Specific distances (wave quantization)

    10. Light and Atoms Absorption and Emission

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