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45 Cards in this Set
- Front
- Back
wave |
disturbance in space |
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crest |
highest point in a wave |
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trough |
lowest point in a wave |
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amplitude |
dustance from midpoint to a point a wave |
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wavelength |
distance betwen two identical waves |
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frequency |
# of waves produced in one second |
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four fundamental forces |
gravitation, electromagnetism, strong force, weak force |
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another name for electromagnetic waves |
electromagnetic radiation |
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what r electromagnetic waves made of |
result of vibrations between magnetic and electric field |
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EM waves are --- waves |
transverse waves |
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how are em waves created |
oscillating electric and magnetic field |
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EM spectrum |
radio, microwave, infrared, visible light, ultraviolet, xray, gamma rays |
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states that like charges repel each other while unlike charges attracts |
coloumbs law |
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showed that magnetic field can be formed with electrons in movement which proves the relationship between electricity and magnetism |
oersted's law |
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establishes a solid bases in physics and provides a basic grasp of the idea underlying transformersand generators. |
Joseph henry |
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discovered electromagnetic induction |
faraday's law |
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devised an electromagnetic telegraph and made a calculation regarding the ratio between the electrodynamic and electrostatic units of charge |
wilhelm Weber |
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he suggested that light, an electric fieldand a magnetic field could all beexplained in a single electromagnetictheory. |
Maxwell |
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discovered Radio Waves or Hertzian |
hertz |
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showed that two parallel wires carrying electriccurrents repel or attract each other, depending on whetherthe currents flow in the same or opposite directions,respectively |
ampere |
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properties of light |
- travels in a straight line - much faster than sound - able to see things bc light is reflected into our eyes - shadows r formed when light is blocked by an opaque object |
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reflection |
bouncing of light raysoff a surface |
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types of reflection |
specular and diffuse |
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specular reflection |
Reflection off ofsmooth surfaces |
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diffuse reflection |
Reflection off ofrough surfaces |
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Characteristics of the imageformed by a plane mirror: |
- image is upright - image & object r same size - image is virtual - image is laterally inverted - distance of the object from the mirror is equal to the distance of the image from the mirror |
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ray of light that strikes themirror |
Incident ray |
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light ray that bounces offthe mirror and strikes your eye |
Reflected ray- |
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a line perpendicular the surface |
Normal |
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angle made by theincident ray with the normal |
Angle of Incidence |
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- angle made by thereflection ray with the normal |
Angle of Reflection - |
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law of reflection |
- angle of incidence = angle of reflection - incident ray, reflected ray and normal all lie in the same plane |
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concave mirrors |
- have a surface that bends inwards - images formed can be virtual or real - light rays converge at one point after they strike and are reflected from the surface |
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convex mirrors |
- have a surface that bends outwards - covers a wider field of vision - imaged are usually upright, distorted, and smaller |
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focal point in concave mirror |
the point atwhich a parallel beam of light is"focused" after reflection in the mirror. |
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focal point in convex mirror |
the point from which light appears tohave originated after reflection fromthe mirror. |
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point in the center ofthe sphere from whichthe mirror was sliced |
center of curvature |
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straight line passingthrough the pole and thecentre of curvature |
principal axis |
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is concave mirror converging or diverging |
converging |
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is convex mirror converging or diverging |
diverging |
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is convex lens converging or diverging |
converging |
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is concave lens converging or diverging |
diverging |
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convex lens |
- thicker in the center - forms real and virtual depending on position of object - makes parallel light rays passing through bend inward and converge at the F |
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concave lenses |
thicker at the edges - forms upright, reduced, image, and virtual image - makes parallel light rays curve outward or diverge |
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Method used to predict the characteristics of imageformed in curved mirrors |
Ray Diagram |