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remove part about flashing screen

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blog/posts/biometrics-explained.md
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@ -40,7 +40,7 @@ An optical sensor works just like you'd think it would: by taking a picture of y
<figcaption>source: <a href="https://clockit.io/fingerprint-scanner/">clockit.io</a></figcaption> <figcaption>source: <a href="https://clockit.io/fingerprint-scanner/">clockit.io</a></figcaption>
</figure> </figure>
Many devices implement one of these sensors under the display. You can tell if yours does because it will flash you with a bright light when you try to scan your finger. This happens so the optical sensor can capture a clear image of your finger. Many devices implement one of these sensors under the display.
Optical sensors can also struggle in the presence of bright sunlight, which is an issue on a mobile device that you take around with you and use wherever you are. Optical sensors can also struggle in the presence of bright sunlight, which is an issue on a mobile device that you take around with you and use wherever you are.