YarHarSuperstar@lemmy.world to

Ask Lemmy@lemmy.world · 2 months ago

Why is the sky purple in the reflection of my friend's glasses?

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Why is the sky purple in the reflection of my friend's glasses?

YarHarSuperstar@lemmy.world to

Ask Lemmy@lemmy.world · 2 months ago

They’re just regular (prescription) glasses. The sky looks normal through them. What’s the deal?

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DarkShaggy@lemmy.world
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2 months ago
Most likely uv protective coating.
- Xaphanos@lemmy.world
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  2 months ago
  Any coating might produce this through reflective destructive interference.
  - DarkShaggy@lemmy.world
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    2 months ago
    True but where I live in CA this would likely be the coating selected by the majority of people.

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