❓ why
Why do some icebergs look blue?
icelightpolar regions
Quick Answer
Blue icebergs are made of dense, bubble-free glacial ice that absorbs red light, so mostly blue light is scattered back to our eyes.
The Full Story
Most icebergs look white because countless tiny air bubbles and cracks scatter all colours of light equally. Ice formed deep inside a glacier has been compressed for centuries, squeezing out most bubbles. In this dense ice, light travels much further before bouncing back. Water ice absorbs red and yellow wavelengths slightly more than blue, so over long paths the reflected light becomes distinctly blue. Some icebergs even show green or dark streaks from algae, sediment or refrozen seawater.
Key Facts
1.Glacial ice can be hundreds or even thousands of years old.
2.White ice looks white because air bubbles scatter all colours of light.
3.Some Antarctic icebergs appear green due to dissolved organic matter and iron-rich particles.
YouTube Angle
Suggested video title for this topic:
"Why a chunk of ancient ice glows electric blue — the physics of colour in glaciers."