Transcript Sound and Waves - scienceinquirer

Cool Tools
for
Color & Light
Presented by
Mike Horton
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Why study color and light?
California Science Standards
Grade 2- “1. d. Students know energy can be carried from one place to
another by waves, such as water waves and sound waves, by electric
current, and by moving objects.”
Grade 3- “2. d. Students know an object is seen when light traveling from
the object enters the eye. Students know the color of light striking an object
affects the way the object is seen.”
Grade 6- “a. Students know energy can be carried from one place to another
by heat flow or by waves, including water, light and sound waves, or by
moving objects.”
Grade 7- “a. Students know visible light is a small band within a very broad
electromagnetic spectrum. 6. b. Students know that for an object to be seen,
light emitted by or scattered from it must be detected by the eye.
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Why study color and light?
California Science Standards
Grade 7- “Students know light travels in straight lines if the medium it
travels through does not change. Students know how simple lenses are used
in a magnifying glass, the eye, a camera, a telescope, and a microscope.
Students know that white light is a mixture of many wavelengths (colors)
and that retinal cells react differently to different wavelengths. Students
know light can be reflected, refracted, transmitted, and absorbed by matter.
Students know the angle of reflection of a light beam is equal to the angle of
incidence.”
High School Physics “Students know waves carry energy from one place
to another. Students know how to solve problems involving wavelength,
frequency, and wave speed. Students know radio waves, light, and X-rays
are different wavelength bands in the spectrum of electromagnetic waves
whose speed in a vacuum is approximately 3 × 108 m/s.”
Why study color and light?
California Science Standards
High School Physics (cont.) “Students know how to identify the
characteristic properties of waves: interference (beats), diffraction,
refraction, Doppler effect, and polarization. Students know the experimental
basis for . . . Einstein’s explanation of the photoelectric effect. Students
know that spectral lines are the result of transitions of electrons between
energy levels and that these lines correspond to photons with a frequency
related to the energy spacing between levels by using Planck’s relationship
(E = hv).”
High School Earth Science “Students know the fate of incoming solar
radiation in terms of reflection, absorption, and photosynthesis.”
Scientific Literacy
Reflection in a rear-view mirror
Refraction in an aquarium
Color in the blue sky
Polarization in sunglasses
Diffraction in astronomy
Primary colors and color mixing
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Electromagnetic Waves
Light is a form of energy
Electromagnetic waves
can be visible or invisible.
Light behaves like a wave
and like a particle.
White light is composed
of many colors.
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Behavior of Light
Reflection
Refraction
Polarization
Diffraction
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Polarization
Unpolarized light
Horizontal and
Vertical components
Linear Polarizing
Filter
Vibrations in one
plane only
Direction of
light
propagation
Unpolarized light
Linear Polarizing
Filter (Horizontal)
Vibrations in one
plane only
Linear Polarizing
Filter (Vertical)
No light
remains
Direction of
light
propagation
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Polarization
Vertical and
Horizontal
vibrations
Vertical and
Horizontal
vibrations
“Polarizer”
Vertical
vibrations only
“Polarizer”
Vertical
vibrations only
“Polarizer”
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“Polarizer”
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Quiz
Which of these are primary colors?
a.
e.
b.
f.
C.
g.
d.
h.
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Color
A prism can separate
white light into a
spectrum.
Red, Blue, and Green
light add to produce
white.
Cyan, Magenta, and
Yellow are the primary
pigments used in
printing.
Different light sources
have different spectra.
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Optics
Law of Reflection
Concave mirrors focus
light.
Convex mirrors
spread light out.
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Mirage
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Law of Reflection
Focal Point
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Periscope
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Light Box & Optical Set
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Retinal Fatigue
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Retinal Fatigue
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Thank You!
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[email protected]
(800) 367-6695
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