physics: waves & energy

physics: waves & energy

1. law of conservation of energy

2. analogue vs digital

   • Analogue
     • -signal VARIES CONTINUOUSLY - Takes ANY VALUE
       • advantages - NO INFO LOST -signal does NOT need EXTRA PROCESSING
   • Digital
     • - signal can only take CERTAIN VALUES (1,0)
       • Advantages -carries MORE INFO -NOISE is easily REMOVED -overall BETTER SOUND QUALITY -EASER to have MORE CHANNELS
   • binary

3. EM spectrum

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