Communication Through Electromagnetic Waves

123456789
Across
  1. 2. Wave type that can pass through walls easily
  2. 5. Orbit close to Earth with little delay
  3. 8. Advantage of digital signals over analogue
  4. 9. Signal that travels in 0s and 1s
Down
  1. 1. Device that cleans and boosts signals in transmission
  2. 3. Process of converting sound into electrical/digital signals
  3. 4. Problem that affects analogue signals over distance
  4. 6. Medium used to transmit light signals in communication
  5. 7. Satellite communication delay caused by long distance