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Q & A: The Color of Water and Ice

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Most recent answer: 10/22/2007
Q:
when ice melts does it change color?
- george (age 10)
A:
Water and ice have the same intrinsic color: blue. Water and ice absorb red light, and we see the blue light that both transmit. The true nature of this color is only apparent through multiple meters. A glass of water does not look blue, and an ice cube does not look blue to us. However, the Caribbean and certain glaciers are obviously deep blue.

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(published on 10/22/2007)

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