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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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Prism

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
Last lesson

  • Refraction of light


Refraction
Refraction

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





Prism1
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


Today s lesson
Today’s lesson

  • Total Internal Reflection

  • Fibre-optic cables

  • Seeing colours


Another little investigation
Another little investigation!

Aim all beams at the centre of the semi circle


Another little investigation1
Another little investigation!

Aim all beams at the centre of the semi circle







Critical angle4
Critical Angle?

Critical angle


Total internal reflection1

Copy please!

Total Internal Reflection

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


Total internal reflection2
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 reflection1
Examples of Total Internal Reflection


Examples of total internal reflection2
Examples of Total Internal Reflection


Examples of total internal reflection3
Examples of Total Internal Reflection


Examples of total internal reflection4
Examples of Total Internal Reflection


Examples of total internal reflection5
Examples of Total Internal Reflection






Combining light

YouTube - Bill Nye the Science Guy - 16 - Light and Color 1/3

YouTube - Bill Nye the Science Guy - 16: Light and Color 2/3Related Videos

Combining light


Let s try some questions
Let’s try some questions! 1/3

“Coloured lights”


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