1. Starter  Write down on the mini white board the types of electromagnetic wave used for communication.
(Hint) Remember the types:
Gate X
Usually
Lets In
Most
Radiation

2. Electromagnetic waves for communicating
C/W nd November 2011
Electromagnetic waves for communicating
Keywords: carrier wave modulation
Objectives:
Must – State which types of electromagnetic waves are used for communication. (C/D)
Should – Understand how information is carried using electromagnetic waves. (C/B)
Could – Consider why we use specific electromagnetic waves for carrying information. (A/A*)

3. Complete the table whilst we are discussing the types of radiation.

4. Visible light, is used in fibre optics, and Morse code........

5. Microwaves are used in mobile phones, satellite TV, and sat-nav.
Not absorbed by the earths atmosphere, can be transmitted into space.

6. Radio waves are used for:
Radio signals, terrestrial TV, and walky-talkies

7. Infra red is used for:
Remote controls  These waves can only travel short distances in air.

8. Low frequency and energy
High frequency and energy
Type of EM-wave
Communication Uses
Extra information
radio waves
Radios, TV
microwaves
Satnav, mobile phones, satellite TV
Can be transmitted into space.
infrared
TV remotes
Can only be transmitted short distance
visible
Fibre optics, Mores code
Hard to use if there is other light around
ultraviolet
N/A
X-rays
gamma rays

9. Electromagnetic waves for communicating
C/W nd November 2011
Electromagnetic waves for communicating
Keywords: carrier wave modulation
Objectives:
Must – State which types of electromagnetic waves are used for communication. (C/D)
Should – Understand how information is carried using electromagnetic waves. (C/B)
Could – Consider why we use specific electromagnetic waves for carrying information. (A/A*)

10. We are going to see how signals are actually broadcast as a wave
We are going to see how signals are actually broadcast as a wave..... Today’s Jazzy simulation
Recap on waves 
Crest / Peak a
 Displacement + 
Time a 
Trough

11. How are sound waves broadcast through the air?
1st we need a high frequency carrier wave....
Then we need to add the sound wave to it that we want to transmit
This gives us a modulated carrier wave

12. We are going to see how signals are actually broadcast as a wave.....
Pupils make their own waves using audacity
Complete questions on worksheet.

13. One type of e-mag wave used for communication and it’s application
Plenary sketch on your mini white board
One type of e-mag wave used for communication and it’s application

14. Plenary sketch on your mini white board
The carrier wave
Sound signal to be broadcast
Modulated carrier wave

15. Electromagnetic waves for communicating
C/W nd November 2011
Electromagnetic waves for communicating
Keywords: carrier wave modulation
Objectives:
Must – State which types of electromagnetic waves are used for communication. (C/D)
Should – Understand how information is carried using electromagnetic waves. (C/B)
Could – Consider why we use specific electromagnetic waves for carrying information. (A/A*)

16.
Or google ‘Boswells physics’