CHM 2045 - CH 6 CLUTCH PREP.pdf

# CHM 2045 - CH 6 CLUTCH PREP.pdf - CHEMISTRY KOTZ 9E CH.6...

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CHEMISTRY - KOTZ 9E CH.6 - THE STRUCTURE OF ATOMS

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CONCEPT: THE NATURE OF LIGHT Visible light represents a small portion of the continuum of radiant energy known as _______________________________. The visible light spectrum ranges from ______________ to ______________ . Its wave properties of electromagnetic radiation are described by two independent variables: _________ ( ν , Greek mu ) is the number of waves you have per second and is expressed in units of ______ or ________. __________ ( λ , Greek lambda ) is the distance from one crest of a wave to the other and is expressed in units of _______. Relationship between frequency & wavelength CHEMISTRY - KOTZ 9E CH.6 - THE STRUCTURE OF ATOMS Page 2
PRACTICE: THE NATURE OF LIGHT A. Based on the images of different electromagnetic waves, answer each of the following questions. I. II. III. a) Which electromagnetic wave has the longest wavelength? b) Which electromagnetic wave has the greatest energy? c) Which electromagnetic wave has the lowest frequency? d) Which electromagnetic wave has the largest amplitude? CHEMISTRY - KOTZ 9E CH.6 - THE STRUCTURE OF ATOMS Page 3

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CONCEPT: INTERCONVERSION OF LIGHT UNITS The speed of a wave, is the product of ν and λ . In a vacuum, all forms of electromagnetic radiation travel at 3.00 x 10 8 , which is a physical constant called the _________________________________ (c). c = ν · λ EXAMPLE: Even the music we listen to deals with how energy travels to get to our car radio. If Power 96 broadcasts its music at 96.5 MHz (megahertz, or 10 6 Hertz) find the wavelength in μ m and A o of the radio waves. PRACTICE: Calculate the frequency of the red light emitted by a neon sign with a wavelength of 663.8 nm. CHEMISTRY - KOTZ 9E CH.6 - THE STRUCTURE OF ATOMS Page 4
CONCEPT: ENERGY AND MATTER Light travels at different speeds as it passes through different media in a phenomenon known as _____________________ . Light passing through the opening of a slit creates a semicircular wave in a phenomenon known as ___________________ . If the light wave passes through two adjacent slits then the semicircular waves can interact with one another . ___________________ inteference ______ amplitude. ___________________ inteference ______ amplitude. CHEMISTRY - KOTZ 9E CH.6 - THE STRUCTURE OF ATOMS Page 5

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CONCEPT: THE PARTICLE NATURE OF LIGHT The physicists Max Planck and Albert Einstein theorized that light was made of small “packets” of electromagnetic energy.
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