Definition of "infra-red" []

• Alternative form of infrared. (adjective)

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• "The second invisibility is that those same gases such as CO2 and methane have molecules shaped in such a way that, although they let hot visible light pass through them, they don't give a pass to the hot light called infra-red light."
• "But to an infra-red telescope it's opaque; you can't look through too much, and less is always better."
• "It was white to help the suit reflect the visible light and infra-red light that would draw heat into the suit."