Why do we see lightning before thunder?
Show answer & explanation
Answer: Light travels faster than sound
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.
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.
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!
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 a 27 °C room feel worse once your skin is sweaty?
- Why can moving air make a 27 C room feel cooler without changing the thermometer?
- Why can a desk beside a cold window feel chilly even when the thermostat across the room still reads 22 C?
- Why might someone who just climbed stairs feel warm in a 22 C room while someone sitting in a T-shirt feels chilly?