Heavy Light Folks, Definitions, Critical Angle, Lateral Shift, Apparent Depth
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| 1600's - Huygens | Wave Theory - waves in ether
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| 1600's - Newton | Corpuscular Theory - light travels as a stream of particles
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| 1670 - Ola of Romer | Danish astronomer that timed the eclipse of Jupiter's moons
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| 1800's - Maxwell | Electromagnetic Theory of Light - improved with math
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| 1800's - Hertz | produced electromagnetic waves in a lab proving Maxwell
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| 1849 - Fizeau | used a toothed cogwheel and a mirror to measure speed of light; 187,000 mi/sec
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| 1900 - Plank | Photon Theory (Quantum Theory) - divided light into small portions called quanta.
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| 1905 - Einstein | used quantum theory to explain the photo-electric effect
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| 1923 - Michaelson | used an octagonal moving mirror experiment to show light travels 186,285 mi/sec in air and 186, 720 mi/sec in a vacuum
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| Source | generates light
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| Point source | infinitely small source of light
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| Extended source | more than one point of light
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| monochromatic source | A source that produces just one wavelength (color)
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| polychromatic source | A source that produces multiple wavelengths (colors)
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| geometric optics | Light traveling in straight lines
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| physical optics | light traveling in waves, also describes "diffraction"
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| Diffraction | light bending around corners
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| wavelengths for visible light | 380-760 nm (400-800)
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| wavelengths used to calculate index of refractions | 587.56 nm (yellow)
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| What are the three factors that influence shift? | Index of Refraction; Angle of Incidence; Thickness of the Medium
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| When any of the influences are increased, the shift will become ________? | Greater
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| What is critical angle? | The angle of incidence when angle r = 90 degrees.
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| When can you exceed the critical angle? | When going from a higher index of refraction into a lower index of refraction medium.
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| If angle i is less than the critical angle the ray is....? | Refracted into the second medium
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| If angle i is more than the critical angle the ray is...? | Reflected back into the first medium....known as total internal reflection
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| How do you find the critical angle? | Use Snell's Law and let angle r = 90 degrees
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| Memorize formulas for Lateral Shift, Apparent Depth when viewing along the normal, and Apparent Depth when viewing from an angle! |
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Created by:
griffiskr
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