Electromagnetic radiation consists of interacting electric and magnetic fields that travel at the sped of light. Some examples of electromagnetic radiations are visible light, X-rays, infrared light, ultraviolet light, and gamma rays. Electromagnetic radiation is a particular form of the more general electromagnetic field (EM field), which is produced by moving charges. Electromagnetic radiation is associated with EM fields that are far enough away from the moving charges that produced them that absorption of the EM radiation no longer affects the behavior of these moving charges
•HOOK:
Teacher shows Youtube song on Electromagnetic
Radiation.
http://www.youtube.com/watch?v=bjOGNVH3D4Y

•ACTION:
Discuss Electromagnetic Spectrum
and the work of Maxwell and Hertz
.


•CONSOLIDTION:
EXIT QUESTION: When
television correspondents are interviewed in a distant part of the world, there
is a delay before hearing their responses. Explain
why.


 
 
 
 
 
Picture
                                  FIG: James Maxwell (1832 -1879)
                          Source: https://www.google.ca

Picture
FIG: Electromagnetic spectrum
Source:https://www.google.ca

Picture
                             FIG:  Electromagnetic wave showing magnetic and electric field spaces
Source: :https://www.google.ca

Picture
 FIG: Heinrich Hertz
(1857- 1894)
Source:https://www.google.ca