In infrared photography, the film or image sensor used within a digital camera is sensitive to infrared lighting, which allows the camera to pick up any light that's invisible to the human eye.
Hot areas glow orange in infraredlight, revealing the active fire front on the south and west sides of the burned area. (the orange horizontal stripes are satellite sensor artifacts.)
红外线领域为橙色，主要活跃在燃烧区域的南面和西面(橙色横纹为人造的卫星传感器)。
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The M1031-W also includes an integrated passive infraredsensor for motion detection, a white LED light, and two-way audio support with a built-in microphone and speaker.