1. Properties of Waves
Properties of Waves

2. Reflection
When light reflects off a mirror the angle of incidence always equals the angle of reflection
Reflection

3. Reflection
Reflection

4. Reflection
Reflection

5. Reflection
Reflection

6. This change in direction is known as refraction.
When light enters a denser transparent substance it slows down and changes direction.
This change in direction is known as refraction.
Refraction

7. Refraction
Refraction

8. Refraction
Refraction

9. Refraction
Refraction

10. Convex and Concave lenses
Refraction

11. Different colours of light are refracted by different amounts.
Dispersion
When white light enters a prism it is split into a spectrum. This is known as dispersion
Different colours of light are refracted by different amounts.
Red light refracts the least, violet light refracts the most
Dispersion

12. Dispersion
Dispersion

13. Dispersion
Dispersion

14. Reflected Colours
Reflected Colours

15. Colour Filters
Refraction

16. Total internal reflection
When a ray of light travels from glass into air some of the light is reflected from the boundary
If the angle of incidence is greater than the critical angle then all the light is reflected inside the glass. This is called Total Internal Reflection.
Optical fibres use total internal reflection
Total internal reflection

17. Total internal reflection

18. Total internal reflection

19. Total internal reflection

20. Endoscope
Endoscope

21. The closer the gap to the wavelength, the greater the diffraction
Diffraction occurs when waves spread out after passing through a small gap.
The closer the gap to the wavelength, the greater the diffraction
Diffraction causes;
sound to be heard in the shadow of buildings
radio signals to be heard in the shadow of hills
Diffraction

22. Diffraction
Diffraction

23. Diffraction
Diffraction

24. Diffraction
Diffraction

25. Quiz
Quiz

26. Wordsearch
Wordsearch