Can You Tan Thru a Window

今注目を集めている Can You Tan Thru a Windowについて、詳しいまとめを分かりやすく掲載しています。

So the tan you might get by a window is almost entirely from UVA rays. It’s a bit like a tan from a tanning bed—mostly superficial and quick to fade.

This is where it gets interesting. Because without the UVB rays, you’re not getting the same protective response from your skin. You might get a little color, but it’s way less efficient than being outside.

Ever notice how your car arm gets a bit darker during a long road trip? That’s the UVA effect in action. It’s real, but it’s a slow, lazy tan.

The Sunburn Twist

Here’s the cool, slightly scary part: you probably won’t get sunburned through a window. That’s because the UVB rays—the ones that cause that painful red glow—are blocked.

But don't get too comfortable. UVA rays are the ones that love to age your skin and create fine lines. They’re like the quiet troublemakers at the party.

Think of it this way: UVB is the loud, obvious bully who leaves a red mark. UVA is the sneaky friend who borrows your stuff and slowly wears it out.