1. Facts of light

2. LIGHT
Emitted
Reflected

3. Visible Light = range of frequencies on the electromagnetic spectrum that stimulate the retina of the eye
Visible light has a wavelength from 400nm(violet) to 700nm(red) Vanta Black
ROYGBIV is the colors of visible light from largest wavelength to smallest
The electromagnetic spectrum includes radio, t.v.,microwaves, infared, visible light, u.v, x rays, gamma rays
All electromagnetic waves have particle(photon) and wave properties
Electromagnetic waves require NO medium to travel
All electromagnetic waves travel in a straight line
All electromagnetic waves travel at 3.00 X 108 m/s
Optics are studied using light ray diagrams

4. Electromagnetic Spectrum

5. History of Light Galileo hypothesized that light had a finite speed
Ile Roemer ( ) first to calculate speed of light by using Jupiter’s moon Io (2.2 x108 m/s) Roemer’s experiment
Albert Michelson( ) First American to win a Nobel Prize for his speed of light
1960’s LASER developed (Lt. amplified by stimulated radiation emission)
Because of wave like properties still use v = f λ

6. Reflection The bouncing back of waves
Law of Reflection states the angle of incident equals the angle of reflection

7. Reflection

8. Refraction The bending of light through a change in medium
Wave changes from one medium to another

9. Refraction

10. Diffraction The bending of light around a barrier
Wave stays in same medium
Diffraction Simulation

11. Diffraction

12. Polarization
Light consisting of waves that vibrate at a specific plane

13. Polarization

14. Transparent
Light passes through with little or no distortion

15. Translucent
Allows light to be transmitted through the material but object is distorted

16. Opaque
Material absorbs or reflects all light. There is no transmission of light.

17. Colors of Light
Newton discovered that white light is made of the spectrum of colors ROYGBIV
Complimentary colors add to primary colors to make white light (Red and Cyan)
This is an additive process. When you add the 3 primary colors of light Red, Blue and Green you get = White light
Examples of the additive process are:

18. Colors of Light