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Light Stop Faking It!. Strand: Force, Motion, and Energy ä SOL 5.3 The student will investigate and understand basic characteristics of white light. Key.

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Presentation on theme: "Light Stop Faking It!. Strand: Force, Motion, and Energy ä SOL 5.3 The student will investigate and understand basic characteristics of white light. Key."— Presentation transcript:

1 Light Stop Faking It!

2 Strand: Force, Motion, and Energy ä SOL 5.3 The student will investigate and understand basic characteristics of white light. Key concepts include: ä The visible spectrum, light waves, reflection, refraction, diffraction, opaque, transparent, translucent; ä Optical tools (eyeglasses, lenses, flashlight, camera, kaleidoscope, binoculars, microscope light boxes, telescope, prism, spectroscope, mirrors); and ä Historical contributions in light

3 Essential Knowledge, Skills, and Processes ä Explain the relationships between wavelength and the color of light. Name the colors of the visible spectrum. ä ROYGBIV

4 Vocabulary ä Visible spectrum (visible light): a combination of several different wavelengths of light traveling together. It is part of the Electromagnetic Spectrum.

5 Essential Knowledge, Skills, and Processes ä Diagram and label a representation of a light wave (wavelength, peak, trough)

6 Vocabulary ä Waves: a disturbance which carries energy and that travels away from the starting point. ä Wavelength: the distance between one crest of a wave and the next crest (distance between compressions); red is longest and violet is shortest ä Peak: the highest point of a light wave ä Trough: the lowest point of a light wave ä Frequency: the number of waves (light or sound) produced in a given unit of time, such as a second

7 Essential Knowledge, Skills, and Processes ä Compare and contrast reflection and refraction Reflection Refraction

8 Vocabulary ä Reflection: the bouncing of light from a surface ä Refraction: the bending of light as it passes through one material to another

9 Essential Knowledge, Skills, and Processes ä 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.

10 Essential Knowledge, Skills, and Processes ä 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.

11 Essential Knowledge, Skills, and Processes ä Identify some common optical tools, and describe whether each has lenses, mirrors, and/or prisms in it. These should include: ä eyeglasses ä flashlights ä cameras ä binoculars ä microscopes

12 Essential Knowledge, Skills, and Processes ä ä Eyeglasses: have lenses c. Hyperopia (farsightedness) a. Normal eye b. Myopia (nearsightedness) Corrected with concave lens Corrected with convex lens No correction needed

13 Essential Knowledge, Skills, and Processes ä Flashlight: has lenses and a mirror

14 Essential Knowledge, Skills, and Processes ä Cameras: have lenses, mirrors, and a prism

15 Essential Knowledge, Skills, and Processes ä Binoculars: have lenses and prisms

16 Essential Knowledge, Skills, and Processes ä Microscope: has lenses

17 Essential Knowledge, Skills, and Processes ä Explain the terms transparent, translucent, and opaque, and give an example of each. Plastic wrap Wax paper Aluminum Foil Transparent Translucent Opaque

18 Vocabulary ä Transparent: materials that allow all light to pass through ä Translucent: letting light through but scattering it ä Opaque: materials that do not let light through ä Transmit: to send (as in sound or light). It also means light passing through an object.

19 Essential Knowledge, Skills, and Processes ä Analyze the effects of a prism on white light and describe why this occurs. Explain why a rainbow occurs.

20 Essential Knowledge, Skills, and Processes ä Describe the contributions of these scientists in creating and using optical tools: ä Galileo Galilei ä Robert Hooke ä Anton van Leeuwenhoek ä Isaac Newton

21 Galileo Galilei ä Italian ä Lived from ä Developed the refracting telescope ä Developed the first known example of the microscope

22 Robert Hooke ä English ä Lived from ä Devised the compound microscope and illumination system ä Discovered plant cells ä Examined fossils with a microscope

23 Anton van Leeuwenhoek ä Dutch; born in Holland ä Lived ä Made over 500 simple microscopes ä Discovered bacteria, free-living and parasitic microscopic protists

24 Isaac Newton ä English ä Lived from ä Discovered that white light was not a simple entity, but splits into a range of colors ä When he passed white light through a glass prism, he noted that a spectrum of light was formed; particle theory of light ä Reflecting telescope


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