Internet and Connectivity
What Airplane Mode Really Does
Airplane mode is a single switch that shuts down a phone's transmitters. Here is which radios it silences, why cellular signals are the real concern, and what stays on.
Category
Internet and Connectivity
Airplane mode, Bluetooth, the cloud and encryption: what really happens when your devices talk to each other and to the network.
Articles in this category
4 articles · 30 quiz questions (10 easy, 10 medium, 10 hard).
Internet and Connectivity
How Bluetooth Connects Nearby Devices
Bluetooth lets headphones, phones, and sensors find each other and share data over short distances. Here is how discovery, pairing, and frequency hopping work.
Internet and Connectivity
What Storing Files in the Cloud Really Means
The cloud is not a place in the sky. It is rented capacity in data centers, with copies, syncing, and access controls. Here is what actually happens to your files.
Internet and Connectivity
How Encryption Protects Information
Encryption turns readable data into scrambled bytes that only a key can undo. Here is how symmetric ciphers, public-key exchange, and secure web connections fit together.
Other categories
Computers and Devices
From the keyboard layout you type on to the sensors that recognize your fingerprint, everyday devices are full of design decisions with a story behind them.
Everyday Inventions
Batteries, LEDs, solar panels, microwaves and induction cooktops: the physics behind gadgets we use without a second thought.
Image, Sound and Media
How QR codes and barcodes carry data, how cameras capture light, how compression shrinks files and how headphones erase noise.