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L5-13. Plexiglass Spiral With Laser
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L5-13. Plexiglass Spiral With Laser
Purpose
To demonstrate total internal reflection with laser light.
Equipment
Plexiglass spiral with laser.
Images
Description
Due to total internal reflection the light from the laser remains mostly confined within the spiral plexiglass rod,and only exits at the end, where the angle between the surface and the incoming light exceeds the critical angle. Actually, some light escapes at scratches along the spiral, as can be seen in the photograph.
References
Peter J. Cumpson, Light Scattering by Fibers: An Analysis Using the Partial Wave Phase-shift Formalism of Quantum Mechanics,AJP 58, 659-663, (1990).
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See pagesl1. light sources & light rays
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See pagesl2. plane mirrors
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See pagesl3. curved mirrors
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See pagesl4. refraction
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See pagesl5. total internal reflection
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See pagesl6. lenses
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See pagesl7. optical instruments
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See pagesl1. light sources & light rays
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See pagesl2. plane mirrors
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See pagesl3. curved mirrors
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See pagesl4. refraction
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See pagesl5. total internal reflection
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See pagesl6. lenses
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See pagesl7. optical instruments
Physics Lab Demos