Mmastodon SciencePhysics first seen 5 d ago, last 4 d ago, peak #1
Why glacier cave ice glows blue
Original: Glacier cave ice often appears blue because it absorbs longer (red) wavelengths of light. Clear ice looks bluer than bub
Glacier cave ice often appears blue because it absorbs longer, red wavelengths of light. Clear ice looks bluer than bubbly ice, since light travels farther through it and filters out even more red. The explanation comes from a cave in Canwell Glacier in Alaska, with a deeper look at the physics of how ice scatters and absorbs sunlight.
Why now: Striking glacier cave imagery paired with an accessible science explanation is drawing attention.
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Evidence
- Glacier cave ice often appears blue because it absorbs longer (red) wavelengths of light. Clear ice looks bluer than bubbly ice because light penetrates farther and filters out more red light. I wrote about this cave in the Canwell Glacier and more about the science behind it… · leepetersen@alaskan.social · 17
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