Technology 4 ESO – Unit 4 COMMUNICATION TECHNOLOGY page 54 activity 45
a) Watch the video on “Electromagnetic Waves” and answer:
- I) What is “wave length”? How is it denoted?
- II) What is the difference between sound waves and electromagnetic waves?
b) In this link: http://www.google.es/imgres?imgurl=http://www.astronomynotes.com/light/emanim.gif&imgrefurl=http://www.astronomynotes.com/light/s3.htm&h=311&w=496&sz=18&tbnid=4YDWF2lJgNPfDM:&tbnh=75&tbnw=120&zoom=1&usg=__vJ4nWX1lHcCuH95ha7avAVov37o=&docid=SkvxDAZLmrEmvM&sa=X&ei=R3MKUoqyB8WN7Ab89oGABQ&sqi=2&ved=0CEcQ9QEwAg&dur=390 we can watch the motion of the magnetic and electric fields.
What two fields are represented?
