Refraction. Reflection & Refraction Refraction Air – lower refractive index Water – higher...
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Transcript of Refraction. Reflection & Refraction Refraction Air – lower refractive index Water – higher...
![Page 1: Refraction. Reflection & Refraction Refraction Air – lower refractive index Water – higher refractive index The Kingfisher When light is passing from.](https://reader035.fdocuments.us/reader035/viewer/2022062304/56649e6b5503460f94b69fa2/html5/thumbnails/1.jpg)
Refraction
![Page 2: Refraction. Reflection & Refraction Refraction Air – lower refractive index Water – higher refractive index The Kingfisher When light is passing from.](https://reader035.fdocuments.us/reader035/viewer/2022062304/56649e6b5503460f94b69fa2/html5/thumbnails/2.jpg)
Reflection & Refraction
![Page 3: Refraction. Reflection & Refraction Refraction Air – lower refractive index Water – higher refractive index The Kingfisher When light is passing from.](https://reader035.fdocuments.us/reader035/viewer/2022062304/56649e6b5503460f94b69fa2/html5/thumbnails/3.jpg)
Refraction
![Page 4: Refraction. Reflection & Refraction Refraction Air – lower refractive index Water – higher refractive index The Kingfisher When light is passing from.](https://reader035.fdocuments.us/reader035/viewer/2022062304/56649e6b5503460f94b69fa2/html5/thumbnails/4.jpg)
Air – lower refractive index
Water – higher refractive index
The Kingfisher•When light is passing from a higher refractive substance into a lower refractive substance the light rays bend away from the perpendicular to the surface.
perpendicular
Refraction
![Page 5: Refraction. Reflection & Refraction Refraction Air – lower refractive index Water – higher refractive index The Kingfisher When light is passing from.](https://reader035.fdocuments.us/reader035/viewer/2022062304/56649e6b5503460f94b69fa2/html5/thumbnails/5.jpg)
Air – lower refractive index
Water – higher refractive index
The Fish•When light is passing from a lower refractive substance into a higher refractive substance the light rays bend toward the perpendicular to the surface.
perpendicular
Refraction
![Page 6: Refraction. Reflection & Refraction Refraction Air – lower refractive index Water – higher refractive index The Kingfisher When light is passing from.](https://reader035.fdocuments.us/reader035/viewer/2022062304/56649e6b5503460f94b69fa2/html5/thumbnails/6.jpg)
Air – lower refractive index
Glass – higher refractive index
Glass Window
Air – lower refractive index
Refraction
•Light passing through a transparent material exits at the same angle it enters
![Page 7: Refraction. Reflection & Refraction Refraction Air – lower refractive index Water – higher refractive index The Kingfisher When light is passing from.](https://reader035.fdocuments.us/reader035/viewer/2022062304/56649e6b5503460f94b69fa2/html5/thumbnails/7.jpg)
Lens
ApplicationRefraction
![Page 8: Refraction. Reflection & Refraction Refraction Air – lower refractive index Water – higher refractive index The Kingfisher When light is passing from.](https://reader035.fdocuments.us/reader035/viewer/2022062304/56649e6b5503460f94b69fa2/html5/thumbnails/8.jpg)
Total Internal ReflectionTotal Internal Reflection
• Can occur when light inside glass block hits the edge at
certain angles
• As you increase the angle the ray gets bent
• However – at a particular angle called the Critical Angle
something strange happens
![Page 9: Refraction. Reflection & Refraction Refraction Air – lower refractive index Water – higher refractive index The Kingfisher When light is passing from.](https://reader035.fdocuments.us/reader035/viewer/2022062304/56649e6b5503460f94b69fa2/html5/thumbnails/9.jpg)
TOTAL INTERNAL REFLECTION OF LIGHT
NINCIDENT RAY
REFRACTED RAY
The ray is refracted parallel to the edge of the block at the
Critical angle
![Page 10: Refraction. Reflection & Refraction Refraction Air – lower refractive index Water – higher refractive index The Kingfisher When light is passing from.](https://reader035.fdocuments.us/reader035/viewer/2022062304/56649e6b5503460f94b69fa2/html5/thumbnails/10.jpg)
As we increase the angle of As we increase the angle of incidenceincidence
• As the angle of incidence increases, the ray is now only reflected back inside the block
• The edge of the block acts like a mirror• The ray does not pass out of the block• This is total internal reflection
![Page 11: Refraction. Reflection & Refraction Refraction Air – lower refractive index Water – higher refractive index The Kingfisher When light is passing from.](https://reader035.fdocuments.us/reader035/viewer/2022062304/56649e6b5503460f94b69fa2/html5/thumbnails/11.jpg)
So the 600 angle has total internal reflection
![Page 12: Refraction. Reflection & Refraction Refraction Air – lower refractive index Water – higher refractive index The Kingfisher When light is passing from.](https://reader035.fdocuments.us/reader035/viewer/2022062304/56649e6b5503460f94b69fa2/html5/thumbnails/12.jpg)
Internal ReflectionInternal Reflection• This occurs only when light travels from
more dense to less dense media.
![Page 13: Refraction. Reflection & Refraction Refraction Air – lower refractive index Water – higher refractive index The Kingfisher When light is passing from.](https://reader035.fdocuments.us/reader035/viewer/2022062304/56649e6b5503460f94b69fa2/html5/thumbnails/13.jpg)
AppplicationsAppplications• Fibre optics
– Communication– Lighting– Endoscopy