Research reveals how close human vision comes to sensing the smallest possible unit of light. Here’s why that matters for ...
From vision defects to rainbows and sky colour, here’s a quick-scoring, concept-based summary aligned with the CBSE dual exam system.
Horizon visible at 3 miles (4.8 km) for 5ft tall person with 20/20 vision. Eye detects candle flame at 1.6-2.8 km, surpassing smartphone camera ability. Eye can detect 5-9 photons in 100ms, calibrated ...