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 reflected ray
Normal
Surface

4. Reflection

5. Reflection
incident ray reflected 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 reflected 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

12. Refraction
Refraction
bending of waves when passing
from one medium to another

13. 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

14. Refraction
SLOWER

15. Refraction
FASTER

19. Refraction
Rainbows
refraction-reflection-refraction

22. Diffraction
Diffraction
bending of waves around a
barrier
depends on the wavelength
and size of the opening barrier.

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

26. 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

27. Interference
destructive when the crest of
one wave meet the trough of
the other wave

28. Interference
constructive brighter light
destructive dimmer light

29. Interference
Thin Films - Bubbles & Oil
Slicks
interference results from
double reflection