Life Tip: How to Tell the Difference Between a Real Mirror and a Two-Way Mirror in Fitting Rooms

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This means two-way mirrors are designed to be see-through from one side, which can potentially compromise your privacy if misused.

The Fingernail Test: A Simple Way to Check

The easiest and most popular test to differentiate between the two mirrors is the fingernail test:

  1. Place your fingernail against the mirror’s surface.

  2. Look at the gap between your fingernail and its reflection.

    • If there’s a gap between your nail and the reflection, it’s a real mirror.

    • If your fingernail touches or almost touches its reflection (no gap), it’s likely a two-way mirror.

Why? Because in a real mirror, the reflective coating is behind the glass, creating a slight gap. In a two-way mirror, the reflective coating is on the surface, so your fingernail and its reflection appear to meet.

Other Tips to Spot a Two-Way Mirror

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