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Light. Stop Faking It!. Strand: Force, Motion, and Energy. SOL 5.3 The student will investigate and understand basic characteristics of white light. Key concepts include: The visible spectrum, light waves, reflection, refraction, diffraction, opaque, transparent, translucent;

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light

Light

Stop Faking It!

strand force motion and energy
Strand: Force, Motion, and Energy
  • SOL 5.3 The student will investigate and understand basic characteristics of white light. Key concepts include:
    • The visible spectrum, light waves, reflection, refraction, diffraction, opaque, transparent, translucent;
    • Optical tools (eyeglasses, lenses, flashlight, camera, kaleidoscope, binoculars, microscope light boxes, telescope, prism, spectroscope, mirrors); and
    • Historical contributions in light
essential knowledge skills and processes
Essential Knowledge, Skills, and Processes
  • Explain the relationships between wavelength and the color of light. Name the colors of the visible spectrum.
  • ROYGBIV
vocabulary
Vocabulary
  • Visible spectrum (visible light): a combination of several different wavelengths of light traveling together. It is part of the Electromagnetic Spectrum.
essential knowledge skills and processes5
Essential Knowledge, Skills, and Processes
  • Diagram and label a representation of a light wave (wavelength, peak, trough)
vocabulary6
Vocabulary
  • Waves: a disturbance which carries energy and that travels away from the starting point.
  • Wavelength: the distance between one crest of a wave and the next crest (distance between compressions); red is longest and violet is shortest
  • Peak: the highest point of a light wave
  • Trough: the lowest point of a light wave
  • Frequency: the number of waves (light or sound) produced in a given unit of time, such as a second
essential knowledge skills and processes7
Essential Knowledge, Skills, and Processes
  • Compare and contrast reflection and refraction

Reflection Refraction

vocabulary8
Vocabulary
  • Reflection: the bouncing of light from a surface
  • Refraction: the bending of light as it passes through one material to another
essential knowledge skills and processes9
Essential Knowledge, Skills, and Processes
  • Design an investigation to determine what happens to light as it passes through a convex lens. Describe the results.

A convex lens causes light to converge, or focus, producing an image that is smaller than the original object.

essential knowledge skills and processes10
Essential Knowledge, Skills, and Processes
  • Design an investigation to determine what happens to light as it passes through a concave lens. Describe the results.

A concave lens causes light to diverge, or spread out, producing a larger image than the original.

essential knowledge skills and processes11
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 processes12

No correction needed

a. Normal eye

Corrected with concave lens

b. Myopia (nearsightedness)

c. Hyperopia (farsightedness)

Corrected with convex lens

Essential Knowledge, Skills, and Processes
  • Eyeglasses: have lenses
essential knowledge skills and processes13
Essential Knowledge, Skills, and Processes
  • Flashlight: has lenses and a mirror
essential knowledge skills and processes14
Essential Knowledge, Skills, and Processes
  • Cameras: have lenses, mirrors, and a prism
essential knowledge skills and processes15
Essential Knowledge, Skills, and Processes
  • Binoculars: have lenses and prisms
essential knowledge skills and processes17
Essential Knowledge, Skills, and Processes
  • Explain the terms transparent, translucent, and opaque, and give an example of each.

Plastic wrap Wax paper Aluminum Foil

Transparent Translucent Opaque

vocabulary18
Vocabulary
  • Transparent: materials that allow all light to pass through
  • Translucent: letting light through but scattering it
  • Opaque: materials that do not let light through
  • Transmit: to send (as in sound or light). It also means light passing through an object.
essential knowledge skills and processes19
Essential Knowledge, Skills, and Processes
  • Analyze the effects of a prism on white light and describe why this occurs. Explain why a rainbow occurs.
essential knowledge skills and processes20
Essential Knowledge, Skills, and Processes
  • Describe the contributions of these scientists in creating and using optical tools:
    • Galileo Galilei
    • Robert Hooke
    • Anton van Leeuwenhoek
    • Isaac Newton
galileo galilei
Galileo Galilei
  • Italian
  • Lived from 1564-1642
  • Developed the refracting telescope
  • Developed the first known example of the microscope
robert hooke
Robert Hooke
  • English
  • Lived from 1635-1703
  • Devised the compound microscope and illumination system
  • Discovered plant cells
  • Examined fossils with a microscope
anton van leeuwenhoek
Anton van Leeuwenhoek
  • Dutch; born in Holland
  • Lived 1632-1723
  • Made over 500 simple microscopes
  • Discovered bacteria, free-living and parasitic microscopic protists
isaac newton
Isaac Newton
  • English
  • Lived from 1643-1727
  • Discovered that white light was not a simple entity, but splits into a range of colors
  • When he passed white light through a glass prism, he noted that a spectrum of light was formed; particle theory of light
  • Reflecting telescope