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How Light
travels?
Reflection
 Reflection – light strikes a
surface and is bounced
back.
 Law of Reflection: angle of
incidence = angle of
reflection
 Assumes smooth surface.
 Measured from normal.
Refraction
 Refraction – change in light’s direction as it
passes from one medium to another.
- light bends on the medium.
Diffraction
 Diffraction – The bending of waves around an
obstacle.
 Can let you hear sounds the originate behind an
obstacle.
 Explains how waves can shape coastlines.
 Explains the diffraction pattern produced in the double-
slit experiment.
'Dispersion of Light
 can be defined as the splitting of white light when it
passes through a glass prism into its constituent
spectrum of colors (i.e. violet, indigo, blue, green,
yellow, orange and red).
 Rainbow is the result of
dispersion of light.

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How light travel

  • 2. Reflection  Reflection – light strikes a surface and is bounced back.  Law of Reflection: angle of incidence = angle of reflection  Assumes smooth surface.  Measured from normal.
  • 3. Refraction  Refraction – change in light’s direction as it passes from one medium to another. - light bends on the medium.
  • 4. Diffraction  Diffraction – The bending of waves around an obstacle.  Can let you hear sounds the originate behind an obstacle.  Explains how waves can shape coastlines.  Explains the diffraction pattern produced in the double- slit experiment.
  • 5. 'Dispersion of Light  can be defined as the splitting of white light when it passes through a glass prism into its constituent spectrum of colors (i.e. violet, indigo, blue, green, yellow, orange and red).  Rainbow is the result of dispersion of light.