1. Copyright © 2011 by Darrell Causey, Jr.

2. Understanding Light as a Wave
Copyright © 2011 by Darrell Causey, Jr.

3. What is Light? Light is Electromagnetic Radiation or EMR. AM and FM
Microwaves
Infrared
Visible
Ultraviolet
X-rays
Copyright © 2011 by Darrell Causey, Jr.

4. Light … “corpuscles” Sir Isaac Newton
Suggested light was a stream of particles.
“corpuscles”
Copyright © 2011 by Darrell Causey, Jr.

5. Light … Christiaan Huygens Suggested light was a wave.
Copyright © 2011 by Darrell Causey, Jr.

6. Light as a Wave James Clerk Maxwell
Developed 4 equations that showed light to be a wave.
Copyright © 2011 by Darrell Causey, Jr.

7. Copyright © 2011 by Darrell Causey, Jr.

8. Electromagnetic Wave
Is composed of an electric wave and a magnetic wave traveling at right angles to each other.
Copyright © 2011 by Darrell Causey, Jr.

9. Electromagnetic Wave
Doesn’t need to travel through a medium (substance).
It can pass through a vacuum.
Copyright © 2011 by Darrell Causey, Jr.

10. Speed of Light 3.00 x 108 meters/sec
Copyright © 2011 by Darrell Causey, Jr.

11. Maximum and Minimum crest trough
Copyright © 2011 by Darrell Causey, Jr.

12. Amplitude ½ the distance between the maxima and minima amplitude
Copyright © 2011 by Darrell Causey, Jr.

13. Wavelength (λ)
wavelength
Copyright © 2011 by Darrell Causey, Jr.

14. Frequency (ν)
The number of cycles that pass through a point in a certain amount of time.
cycle
Copyright © 2011 by Darrell Causey, Jr.

15. Hertz (Hz) One cycle per second (s-1)
Copyright © 2011 by Darrell Causey, Jr.

16. Frequency vs. Wavelength
Frequency and wavelength are inversely proportional.
Copyright © 2011 by Darrell Causey, Jr.

17. ν } Frequency vs. Wavelength λ short HIGH
Copyright © 2011 by Darrell Causey, Jr.

18. ν Frequency vs. Wavelength λ LONG low
Copyright © 2011 by Darrell Causey, Jr.

19. Frequency vs. Wavelength
Frequency times wavelength is the speed of light.
Copyright © 2011 by Darrell Causey, Jr.

20. Questions?
Copyright © 2011 by Darrell Causey, Jr.

21. Check out … www.mrcausey.com For more information.
Copyright © 2011 by Darrell Causey, Jr.