Technology 4 ESO – Unit 4 COMMUNICATION TECHNOLOGY page 50 activity 23
a) In this link: https://www.britannica.com/science/radio-wave/images-videos we can find a video on “Radio waves explored”, watch it and answer:
- I) What is the “signal”?
- II) In what two ways can radio stations modulate the carrier waves?
- III) What is the function of the “tuner”?
- IV) What is the function of the “demodulator”?
b) In this link: https://en.wikipedia.org/wiki/Transistor_radio we can find information about the social impact of the change in technology from vacuum tubes to transistors in radio circuitry.
Describe the advantages of transistors over vacuum tubes and write a summary on how society changed.
