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Light

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Light Illumination Illumination Ray Model of Light Luminous source Illuminated source Opaque Transparent Translucent Luminous Flux Illuminance Speed of light, c ... – PowerPoint PPT presentation

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Title: Light


1
Light
  • Illumination

2
Illumination
  • Ray Model of Light
  • Luminous source
  • Illuminated source
  • Opaque
  • Transparent
  • Translucent
  • Luminous Flux
  • Illuminance
  • Speed of light, c
  • Inverse square law

3
Ray Model of Light
  • A ray that travels in a straight path
  • Does not account for diffraction
  • Can only be altered by an object in the path
  • Used to model interactions with matter
  • Ray optics or geometric optics

Pg 431-438
4
Ray Model of Light
  • Sources of light
  • Luminous source emits light
  • Illuminated source reflects light
  • Luminous sources
  • Examples
  • Illuminated sources can be
  • Opaque (does not transmit light. May reflect)
  • Transparent (transmits light. May reflect)
  • Translucent (transmits light, but not clearly.
    May reflect)

5
Ray Model of Light
  • Luminous flux, P
  • Rate at which light energy is emitted from a
    luminous source
  • Units lumen (lm)
  • All of the light
  • Luminous intensity
  • Units candela (cd)
  • Luminous flux divided by 4p

6
Ray Model of Light
  • Speed of light
  • c 3.0 x108
  • Inverse square law
  • x1/(y2)
  • When y increases, x decreases by a square factor.

7
  • Reflection
  • Ray that returns (bounces) off of a boundary (may
    changes directions).
  • Refraction
  • Ray that is transmitted through a boundary (may
    changes directions).

8
Your Topic Goes Here
  • Your subtopic goes here

9
Light
  • The Wave Nature of Light

10
The Wave Nature of Light
  • Your subtopic goes here

11
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12
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13
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14
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15
Polarized Light
16
Polarization
  • Maluss Law
  • Intensity
  • Wavelength
  • Decrease objects moving toward each other
  • Increase objects moving away from each other

17
Equation Review
Speed of light as a constant
18
Home work
  • Describe the similarities and differences between
    the velocity of sound (vf?) and the velocity of
    light (cf?).
  • Hint Pg 445
  • Describe the similarities and differences between
    the Doppler effect as it applies to sound vs.
    light.
  • Hint Pg 407 446

19
The Wave Nature of Light
  • Diffraction
  • Primary Color
  • Secondary Color
  • Complementary Colors
  • Primary Pigment
  • Secondary Pigment
  • Polarization
  • Maluss Law
  • Clara!

20
The Wave Nature of Light
  • Your subtopic goes here

21
Elements
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