Prism
Sponsored Links
This presentation is the property of its rightful owner.
1 / 30

Prism PowerPoint PPT Presentation


  • 84 Views
  • Uploaded on
  • Presentation posted in: General

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.

Download Presentation

Prism

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


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

Light going from air to glass bends towards the normal

Glass block

Light going from glass to air bends away the normal


The mug trick!


The mug trick!


Homework – To show and explain this to your parents! Due Friday 29th Jan


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

  • Total Internal Reflection

  • Fibre-optic cables

  • Seeing colours


Another little investigation!

Aim all beams at the centre of the semi circle


Another little investigation!

Aim all beams at the centre of the semi circle


Total Internal Reflection


Critical Angle?


Critical Angle?


Critical Angle?


Critical Angle?


Critical Angle?

Critical angle


Copy please!

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


Seeing and colours


We see things because light is reflected into our eyes


Red objects only reflect red light


A Red objects in green light would look black (no reflected 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!

“Coloured lights”


  • Login