Vegetation appears bright in which band of satellite imagery due to high reflectance?
Choose the correct answer
Visible red band (0.6-0.7 um)
Near Infrared band (0.7-1.1 um)
Thermal Infrared band
Microwave band
Correct Answer
B. Near Infrared band (0.7-1.1 um)
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Healthy vegetation: absorbs red and blue light (photosynthesis), reflects NIR strongly (cell structure scattering) = high NIR reflectance. NIR/Red ratio = NDVI = (NIR - Red)/(NIR + Red). NDVI > 0.6 = dense vegetation. This is why false-colour composites show vegetation in red (NIR assigned to red channel).
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