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# Prism - PowerPoint PPT Presentation

Copy please. Prism. What happens when we shine white light into a prism?. Red lights bends the least. Many colours blended together. White light. Violet light bends the most. Last lesson. Refraction of light. Refraction. Beam of light.

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## PowerPoint Slideshow about ' Prism' - gavivi

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Presentation Transcript
Prism

What happens when we shine white light into a prism?

Red lights bends the least

Many colours blended together

White light

Violet light bends the most

• Refraction of light

Beam of light

Light going from air to glass bends towards the normal

Glass block

Light going from glass to air bends away the normal

What happens when we shine white light into a prism?

Red lights bends the least

Many colours blended together

White light

Violet light bends the most

• Total Internal Reflection

• Fibre-optic cables

• Seeing colours

Aim all beams at the centre of the semi circle

Aim all beams at the centre of the semi circle

Critical angle

Total Internal Reflection

If the angle is bigger than the critical angle we get total internal reflection

Total Internal Reflection

Critical angle

sin c = 1/η

sin(critical angle) = 1/(refractive index)

Examples of Total Internal Reflection

Examples of Total Internal Reflection

Examples of Total Internal Reflection

Examples of Total Internal Reflection

Examples of Total Internal Reflection

Examples of Total Internal Reflection

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