# Physics

In sunlight, which becomes warmer: reading glasses or dark sunglasses?

i said reading glasses because the UV waves and infrared resonate on the glass, generating more heat. and dark sunglasses just absorb the heat and convert it into internal energy

is this right? plz help me!!

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1. The dark sunglasses will absorb the heat, and less of the heat resonates back out, so my answer would be the dark glasses. The heat is just reflected back or passed through, not absorbed.

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2. but wouldn't sunglasses be opaque?

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3. No, because then you wouldn't be able to see through them.

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