Post on 01-Apr-2015
transcript
COLOR
COLORWhy do I see all those pretty colors?
Electromagnetic spectrum:
Color wavelengths: Red: 650 nm 0.000000650
meters
Color wavelengths: Red: 650 nm Orange: 590
nm
0.000000650 meters
Color wavelengths: Red: 650 nm Orange: 590
nm
0.000000650 meters
0.000000590 meters
Color wavelengths: Red: 650 nm Orange: 590
nm Yellow: 570 nm
0.000000650 meters
0.000000590 meters
Color wavelengths: Red: 650 nm Orange: 590
nm Yellow: 570 nm
0.000000650 meters
0.000000590 meters
0.000000570 meters
Color wavelengths: Red: 650 nm Orange: 590
nm Yellow: 570 nm Green: 510 nm
0.000000650 meters
0.000000590 meters
0.000000570 meters
Color wavelengths: Red: 650 nm Orange: 590
nm Yellow: 570 nm Green: 510 nm
0.000000650 meters
0.000000590 meters
0.000000570 meters
0.000000510 meters
Color wavelengths: Red: 650 nm Orange: 590
nm Yellow: 570 nm Green: 510 nm Blue: 475 nm
0.000000650 meters
0.000000590 meters
0.000000570 meters
0.000000510 meters
Color wavelengths: Red: 650 nm Orange: 590
nm Yellow: 570 nm Green: 510 nm Blue: 475 nm
0.000000650 meters
0.000000590 meters
0.000000570 meters
0.000000510 meters
0.000000475 meters
Color wavelengths: Red: 650 nm Orange: 590
nm Yellow: 570 nm Green: 510 nm Blue: 475 nm Indigo: 445 nm
0.000000650 meters
0.000000590 meters
0.000000570 meters
0.000000510 meters
0.000000475 meters
Color wavelengths: Red: 650 nm Orange: 590
nm Yellow: 570 nm Green: 510 nm Blue: 475 nm Indigo: 445 nm
0.000000650 meters
0.000000590 meters
0.000000570 meters
0.000000510 meters
0.000000475 meters
0.000000445 meters
Color wavelengths: Red: 650 nm Orange: 590
nm Yellow: 570 nm Green: 510 nm Blue: 475 nm Indigo: 445 nm Violet: 400 nm
0.000000650 meters
0.000000590 meters
0.000000570 meters
0.000000510 meters
0.000000475 meters
0.000000445 meters
Color wavelengths: Red: 650 nm Orange: 590
nm Yellow: 570 nm Green: 510 nm Blue: 475 nm Indigo: 445 nm Violet: 400 nm
0.000000650 meters
0.000000590 meters
0.000000570 meters
0.000000510 meters
0.000000475 meters
0.000000445 meters
0.000000400 meters
Why do I see certain colors? White:
Why do I see certain colors? White: Objects that appear to be
white reflect all portions of the energy frequencies of visible light.
Why do I see certain colors? White: Objects that appear to be
white reflect all portions of the energy frequencies of visible light.
Why do I see certain colors? White: Objects that appear to be
white reflect all portions of the energy frequencies of visible light.
Why do I see certain colors? Black:
Why do I see certain colors? Black: Objects that appear to be
black absorb all portions of the energy frequencies of visible light.
Why do I see certain colors? Black: Objects that appear to be
black absorb all portions of the energy frequencies of visible light.
Why do I see certain colors? Black: Objects that appear to be
black absorb all portions of the energy frequencies of visible light.
Why do I see certain colors? Grey:
Why do I see certain colors? Grey: Objects that appear to be
grey absorb and reflect equal percentages of all portions of the energy frequencies of visible light.
Why do I see certain colors? Grey: Objects that appear to be
grey absorb and reflect equal percentages of all portions of the energy frequencies of visible light.
Why do I see certain colors? Other colors:
Why do I see certain colors? Other colors: Objects that appear
to be a color reflect the color / colors you see and absorb all other colors.
Why do I see certain colors? Other colors: Objects that appear to
be a color reflect the color / colors you see and absorb all other colors.
Primary Colors:
Primary Colors of Light:
RedGreenBlue
Primary Colors: Red Green BlueWhen all three are combined
equally they make white light.
Primary Colors: Red Green Blue When all three are combined equally they
make white light.
When two are combined equally they make a secondary color.
Secondary Colors:
Secondary Colors: Yellow (red + green) Cyan (green + blue) Magenta (red + blue)
Secondary Colors: Yellow (red + green) Cyan (green + blue) Magenta (red + blue) Any two colors that combine to form
white light are called complementary colors.
Secondary Colors: Yellow (red + green) Cyan (green + blue) Magenta (red + blue) Any two colors that combine to form
white light are called complementary colors. (yellow and blue / cyan and red /
magenta and green)
Pigments:
Pigments: Pigments are substances that are
used to color other materials.
Pigments: Pigments are substances that are
used to color other materials. The primary colors of pigments are
cyan, yellow, and magenta.
Prisms :What is happening?
Prisms :What is happening? White light enters a prism its speed
is changed.
Prisms :What is happening? White light enters a prism its speed
is changed. Each wavelength is effected
differently.
Prisms :What is happening? White light enters a prism its speed
is changed. Each wavelength is effected
differently. The longer the wavelength the less
bending there will be.
Prisms :What is happening? White light enters a prism its speed
is changed. Each wavelength is effected
differently. The longer the wavelength the less
bending there will be. The shorter the wavelength the more
bending there will be.
Prisms:
Lenses and mirrors:
Lenses and mirrors: Convex:
Lenses and mirrors: Convex: curved or rounded
outwardly (like the surface of a globe).
Lenses and mirrors: Convex: curved or rounded
outwardly (like the surface of a globe).
Concave:
Lenses and mirrors: Convex: curved or rounded
outwardly (like the surface of a globe).
Concave: curved or rounded inwardly (like the inside of a bowl).
Lenses: How do they work?
Lens Transparent piece of glass or
plastic that refracts light in a predictable way
Diverging/Concave lens A concave lens causes light to
diverge, or spread out, making a smaller image
Convex lens A convex lens causes light to converge, or focus,
the type of image formed by a convex lens depends on the position of the object in relation to the focal point.
Notice, that was what up is down and what was down is up after the focal point
Essential Knowledge, Skills, and Processes Identify some common optical tools, and
describe whether each has lenses, mirrors, and/or prisms in it. These should include: eyeglasses flashlights cameras binoculars microscopes
Essential Knowledge, Skills, and Processes Eyeglasses: have lenses
c. Hyperopia (farsightedness)
a. Normal eye
b. Myopia (nearsightedness) Corrected with concave lens
Corrected with convex lens
No correction needed
Essential Knowledge, Skills, and Processes Flashlight: has lenses and a mirror
Essential Knowledge, Skills, and Processes Cameras: have lenses, mirrors, and
a prism
Essential Knowledge, Skills, and Processes Binoculars: have lenses and prisms
Essential Knowledge, Skills, and Processes Microscope: has lenses
How have humans used science to engineer technologies that use electromagnetic energy?
1. Use of lasers Laser:
Powerful energy of light due to concentrating one wavelength (frequency)(color) of light
All energy is lined up
Lasers
On “same wavelength” In sync with one another (laser)
Flashlight
Lasers
Uses: Fiber optics Surgery UPC codes Burning and reading CD’s, DVD’s
& optical flash drives