Which parts of this process do you think are easiest to see in real life, and which are completely invisible?
The visible parts of communication infrastructure include mobile towers that can be seen in neighborhoods, mobile phones that we use daily, and sometimes fibre cables during installation.
The invisible parts include the complex network of underground fibre cables buried beneath fields and roads, satellites in space that transmit signals, giant servers and data centres in distant cities that process and store data, and the entire backend infrastructure that processes messages.
When Rani sends a voice note, the visible action is tapping the phone. However, the invisible journey includes electricity powering the tower, signals travelling through fibre cables, transmission to satellites, and processing through servers before reaching the recipient's phone.
Explanation
The chapter describes the invisible world behind communication — when Rani sends a voice note, electricity powers the mobile tower, the message travels through fibre cables buried under fields and roads, gets transmitted to satellites in space, and travels through servers in distant cities before appearing on her cousin's phone. This illustrates how much of our critical infrastructure operates invisibly.
Solution Steps
Visible parts of communication infrastructure: mobile towers in neighborhoods, mobile phones used daily, and fibre cables visible during installation
Invisible parts: underground fibre cables beneath fields and roads, satellites in space, servers and data centres in distant cities, and backend infrastructure processing messages
Example with Rani's voice note: visible action is tapping the phone, invisible journey involves electricity powering towers, signals through fibre cables, satellite transmission, and server processing