Properties of light

Reflection
Refraction
Diffraction
Interference

1. Light Wave Properties of Light Reflection Refraction Diffraction Interference

2. Reflection Reflection when a wave strikes an object and bounces off

3. Reflection incident ray r eflected ray Normal Surface

4. Reflection

5. Reflection incident ray r eflected ray Normal Surface

6. Reflection Normal-line perpendicular to the reflecting surface. Incident ray/incoming ray-the ray that hits the barrier/surface. Angle of incidence-angle formed by the incident ray with the normal.

7. Reflection Angle of reflection-angle formed by the reflected ray with the normal.

8. Reflection incident ray r eflected ray Normal Surface

9. Reflection Law of Reflection the angle of incidence equals the angle of reflection The incident ray, reflected ray and the normal lie on the same plane

10. Fiber Optics Total Internal Reflection when all light is reflected back into the denser medium Refraction

11. Refraction Refraction bending of waves when passing from one medium to another

12. Refraction Refraction caused by a change in speed slower (more dense)  refracted ray bends toward the normal faster (less dense)  refracted ray bends away from the normal

13. Refraction SLOWER

14. Refraction FASTER

15. Refraction Rainbows refraction-reflection-refraction

16. Diffraction Diffraction bending of waves around a barrier d epends on the wavelength and size of the opening barrier.

17. Diffraction Gratings glass or plastic made up of many tiny parallel slits may also be reflective spectroscopes, reflective rainbow stickers, CD surfaces Diffraction

18. Interference When two waves meets, they have an effect with each other. constructive  when the crest of one wave meet the crest of the other one

19. Interference destructive  when the crest of one wave meet the trough of the other wave

20. Interference constructive  brighter light destructive  dimmer light

21. Interference Thin Films - Bubbles & Oil Slicks interference results from double reflection