reflection and images formed by reflectionjworkman/teaching/... · reflection and images formed...
TRANSCRIPT
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Reflection and Images Formed by Reflection
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Geometric Optics and the Ray approximation
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Pinhole Camera
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Example - Sun and pinhole
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Law of Reflection
That’s it
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Do You Understand it?
Let’s make sure we all understand the concept of the “Normal”, its NOT the Normal force
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Want to see the light?
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Images Formed by Reflection
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Plane Mirrors
Upright
No MagnificationVirtual
Reverses left and right
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Virtual vs RealDemo
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How big a mirror do you need to see your
feet?
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Spherical MirrorsDefinitions
V = Principle axis r=radius of curvature C=center of curvature
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Image Formation by Principle Rays
I’ll define the focal point later, for now, f=r/2
object behind of the focal point
Concave
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object in front of the focal point
Concave
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Focal Pointrays from infinity
f=r/2
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How to get Numbers
Convex
works for both concave and
convex
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Example’sAlso, what does sign of image distance mean?
It’s positive if a real image is formed there