Why do things look bent in water?
Show answer & explanation
Answer: Light refracts at boundary
Water pressure distorts them — Wrong. Water pressure doesn't distort light or objects. Bending appearance comes from light refraction—light changes speed/direction crossing water-air boundary.
Light refracts at boundary ✓ — Correct! Light travels slower in water (~225,000 km/s) than air (~299,700 km/s). At boundary, light bends (refracts) according to Snell's Law—angle changes based on speed difference. Brain assumes light traveled straight line from object—object appears displaced/bent. Why straws look broken in glass, pools look shallower than they are. Fishermen compensate when spearing fish! Total internal reflection uses same principle.
Eyes adjust incorrectly — Wrong. Eyes work correctly. Bending is real optical effect—light refracts (bends) when crossing between media with different densities.
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?
- In the same 22 C room, why might someone who just climbed stairs feel warm while someone sitting in a T-shirt feels chilly?