Why do we see lightning before thunder?
Show answer & explanation
Answer: Light travels faster than sound
Light travels faster than sound ✓ — Correct! Light travels at 300,000 km/s while sound only travels at 343 m/s in air - light is almost a million times faster! Lightning and thunder happen at the same instant, but light reaches your eyes almost immediately while sound takes time. Count seconds between flash and thunder, divide by 3 - that's roughly how many kilometers away the lightning struck!
Eyes react quicker than ears — Wrong. Your senses react at similar speeds. The delay is because light travels much faster than sound - about a million times faster! They both start at the same moment from the lightning.
Lightning happens first — Wrong. Lightning and thunder happen simultaneously. The lightning creates the thunder by rapidly heating air. You see light first because it travels much faster than sound.
More Physics in Daily Life questions
- In a warm office that already reads 26 C, which change can make people feel cooler without lowering the thermostat?
- Why might 26 C feel acceptable in a breezy naturally ventilated summer building but too warm in a sealed winter office?
- On a warm humid day, why can the same 27 C room feel much worse once you start sweating?
- Why can moving air make a 27 C room feel cooler without changing the thermometer?
- Which hidden factor can make a desk beside a cold window feel chilly even when the thermostat across the room still reads 22 C?
- In the same 22 C room, why might someone who just climbed stairs feel warm while someone sitting in a T-shirt feels chilly?