Pecha Kucha 20 slides Each slide is up

$Pecha Kucha • Reflection • Diffraction • Refraction • Total Internal Reflection$

Reflection • Reflection is when a wave, physical or electromagnetic, bounces off a surface

Reflection • For all reflections on a smooth surface, the angle of incidence is

$Diffraction • Diffraction is a deviation in the direction of the wave at the$

$Diffraction$

$Diffraction • Moire patterns are caused by diffraction. • Light slightly bends around the$

$Refraction • Refraction is the bending of a wave when it enters a medium$

$Refraction • Snell’s Law n 1 sinθ 1 = n 2 sinθ 2 Or$

$Refraction • Sometimes it looks like this • But really it is pretty simple.$

$Refraction • Because light slows or bends more in water than out, it can$

$Index of Refraction$

$Refraction • Because the glass and the oil have the same index of refraction,$

Total Internal Reflection • TIR is the phenomenon that involves the reflection of ALL

TIR • Requirements 1. The light is in the more dense medium and approaches

$Rainbows! Are a combination of refraction, reflection, and dispersion (which is like diffraction).$

Double rainbows? What does it all mean? ?

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Pecha Kucha • 20 slides • Each slide is up for 20 seconds, no more no less. • Math wizards: 20 x 20 = 6 minutes, 40 seconds

$Pecha Kucha • Reflection • Diffraction • Refraction • Total Internal Reflection$

Pecha Kucha • Reflection • Diffraction • Refraction • Total Internal Reflection

Reflection • Reflection is when a wave, physical or electromagnetic, bounces off a surface back towards the source. • An example of this is a reflection in a mirror.

Reflection • For all reflections on a smooth surface, the angle of incidence is equal to the angle of reflection with respect to the Normal line. • The normal line is the line perpendicular to the surface that splits the incident ray and the reflective ray

Can you estimate the N and θ?

Reflection

$Diffraction • Diffraction is a deviation in the direction of the wave at the$

Diffraction • Diffraction is a deviation in the direction of the wave at the edge of an obstacle in its path.

$Diffraction$

Diffraction

$Diffraction • Moire patterns are caused by diffraction. • Light slightly bends around the$

Diffraction • Moire patterns are caused by diffraction. • Light slightly bends around the corners of the first layer of fence and creates interference patterns on the second layer.

$Refraction • Refraction is the bending of a wave when it enters a medium$

Refraction • Refraction is the bending of a wave when it enters a medium where its speed is different.

$Refraction • Snell’s Law n 1 sinθ 1 = n 2 sinθ 2 Or$

Refraction • Snell’s Law n 1 sinθ 1 = n 2 sinθ 2 Or n 1 v 1 = n 2 v 2

$Refraction • Sometimes it looks like this • But really it is pretty simple.$

Refraction • Sometimes it looks like this • But really it is pretty simple. • Light slows down as it enters different substances

$Refraction • Because light slows or bends more in water than out, it can$

Refraction • Because light slows or bends more in water than out, it can create amazing optical illusions.

$Index of Refraction$

Index of Refraction

$Refraction • Because the glass and the oil have the same index of refraction,$

Refraction • Because the glass and the oil have the same index of refraction, light does not bend when it crosses through the two media.

Total Internal Reflection • TIR is the phenomenon that involves the reflection of ALL the incident light off the boundary.

TIR • Requirements 1. The light is in the more dense medium and approaches a less dense medium. 2. The angle of incidence is greater than the socalled critical angle.

TIR in Fiber Optic Cables

$Rainbows! Are a combination of refraction, reflection, and dispersion (which is like diffraction).$

Rainbows! Are a combination of refraction, reflection, and dispersion (which is like diffraction).

Double rainbows? What does it all mean? ?