What color is the optical pane inside the smoke detector?

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Multiple Choice

What color is the optical pane inside the smoke detector?

Explanation:
In an optical smoke detector, controlling the light path inside the sensor is essential for accurate detection. The optical pane is black to absorb stray light and minimize reflections from internal surfaces. This keeps the detector’s photodetector responding mainly to light scattered by smoke particles, improving sensitivity and reducing false alarms from ambient cabin light or internal reflections. A white, gray, or clear pane would reflect or transmit more light from outside the intended path, adding noise and potentially confusing the sensor, which is why the pane is typically black.

In an optical smoke detector, controlling the light path inside the sensor is essential for accurate detection. The optical pane is black to absorb stray light and minimize reflections from internal surfaces. This keeps the detector’s photodetector responding mainly to light scattered by smoke particles, improving sensitivity and reducing false alarms from ambient cabin light or internal reflections. A white, gray, or clear pane would reflect or transmit more light from outside the intended path, adding noise and potentially confusing the sensor, which is why the pane is typically black.

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