P6.C Explaining Refraction
- 2. Explaining Refraction First we need a Perspex or glass block set at an angle The Perspex block is denser than air, but allow light to travel through it (i.e. it is transparent)
- 5. Explaining Refraction To understand refraction, we need to think of light as a wave travelling at 90 o to the light ray
- 6. Explaining Refraction To understand refraction, we need to think of light as a wave travelling at 90 o to the light ray
- 7. Explaining Refraction Imagine different points along that wave
- 8. Explaining Refraction Imagine different points along that wave
- 9. Explaining Refraction As light travels towards the Perspex block, the wave moves forward
- 10. Explaining Refraction As light travels towards the Perspex block, the wave moves forward
- 11. Explaining Refraction As light travels towards the Perspex block, the wave moves forward
- 12. Explaining Refraction As light travels towards the Perspex block, the wave moves forward
- 13. Explaining Refraction As light travels towards the Perspex block, the wave moves forward
- 14. Explaining Refraction As the light hits the Perspex block it slows down because Perspex is more dense than air To light, the Perspex is like walking through treacle The slower light does not travel as far in a given time
- 15. Explaining Refraction As the light hits the Perspex block it slows down because Perspex is more dense than air To light, the Perspex is like walking through treacle The slower light does not travel as far in a given time
- 16. Explaining Refraction But the light that is this travelling through air is still moving quickly, so it travels further in a given time
- 17. Explaining Refraction But the light that is this travelling through air is still moving quickly, so it travels further in a given time
- 18. Explaining Refraction But the light that is this travelling through air is still moving quickly, so it travels further in a given time
- 19. Explaining Refraction In the Perspex, all the light travels at the some speed
- 20. Explaining Refraction In the Perspex, all the light travels at the some speed
- 21. Explaining Refraction In the Perspex, all the light travels at the some speed
- 22. Explaining Refraction In the Perspex, all the light travels at the some speed
- 23. Explaining Refraction In the Perspex, all the light travels at the some speed
- 24. Explaining Refraction In the Perspex, all the light travels at the some speed
- 25. Explaining Refraction In the Perspex, all the light travels at the some speed
- 26. Explaining Refraction As the light hits the air again it speeds up because air is less dense than Perspex
- 27. Explaining Refraction As the light hits the air again it speeds up because air is less dense than Perspex
- 28. Explaining Refraction As the light hits the air again it speeds up because air is less dense than Perspex
- 29. Explaining Refraction As the light hits the air again it speeds up because air is less dense than Perspex
- 30. Explaining Refraction As the light hits the air again it speeds up because air is less dense than Perspex
- 31. Explaining Refraction As the light hits the air again it speeds up because air is less dense than Perspex
- 32. Explaining Refraction As the light hits the air again it speeds up because air is less dense than Perspex