Gadgets
If an App or Website Is Free, How Does It Make Money?
Free apps and websites still need revenue. Learn how ads, subscriptions, in-app purchases, commissions, data, referrals and other models pay the bills.
Articles
Useful explanations, guides, comparisons, analysis and interesting developments.
72 articles to explore · Page 6
Education
Why Can You Watch a Three-Hour Movie but Struggle to Study for 30 Minutes?
Why can you watch a long movie but lose focus while studying? Learn how attention, cognitive effort, reward, memory and distractions explain the difference.
Cricket
How Does Cricket Ball-Tracking Predict Where the Ball Would Have Gone?
Learn how Hawk-Eye-style cricket ball tracking uses multiple cameras, 3D reconstruction and trajectory modelling to predict whether an LBW delivery would have hit the stumps.
Banking & Finance
How Does FASTag Work—and How Is the Toll Money Deducted?
Learn how FASTag uses passive RFID, toll-plaza readers, the NETC network, NPCI and banks to identify your vehicle and deduct the correct toll.
Banking & Finance
How Does UPI Actually Work?
Learn what happens behind the scenes in a UPI payment, from scanning a QR code and entering your PIN to bank communication and confirmation.
Banking & Finance
How Does UPI Actually Work—and What Happens When the Sender and Receiver Use Different Banks?
Follow a UPI payment from QR scan and UPI PIN to NPCI routing, sender-bank debit, receiver-bank credit and interbank settlement.
Technology
How Large Amounts of Data Fit Inside Tiny Storage Devices
Learn how microSD cards, SSDs and flash drives store huge amounts of data using microscopic memory cells, electrical charge and 3D NAND technology.
Gadgets
OLED vs AMOLED: What's the Difference?
OLED and AMOLED sound like competing display technologies, but AMOLED is actually a type of OLED. Here is what the difference really means.
Education
How to Study Difficult Subjects Without Simply Reading Them Again
Learn how to study difficult subjects using worked examples, active recall, self-explanation, problem solving, feedback and spaced practice.
Automobiles
How ABS Works in Modern Cars
Learn how ABS prevents wheel lock during hard braking, how wheel-speed sensors and hydraulic valves work, and why ABS helps you steer while braking.
Cricket
Why Does a Cricket Ball Swing?
Learn why a cricket ball swings in the air, how the seam and surface affect airflow, and what causes conventional, reverse and late swing.
Banking & Finance
What Is the Repo Rate and Why Does It Matter?
Learn what the RBI repo rate actually is, why it changes, and how it can affect home loans, EMIs, deposits, inflation and the wider economy.