Leaf water content governs the reflection of solar radiation within the reflective optical infrared spectrum______________?
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Answer: C. Short wave-IR (1.3 –
Explanation
Leaf water content strongly absorbs incident solar radiation within specific short-wave infrared spectral bands. Short-wave infrared reflectance decreases as internal leaf moisture levels increase during the growing season. Water absorption bands in this region allow remote sensors to detect plant water stress before visible wilting. The optical infrared spectrum is divided into near-infrared and short-wave infrared regions based on atmospheric windows. Plant leaves contain cellular structures and water pockets that interact uniquely with infrared radiation wavelengths. Spectroradiometers measure leaf reflectance to estimate biochemical composition and moisture status non-destructively.
Agricultural irrigation managers use short-wave infrared imagery to schedule watering and prevent crop drought stress. Forestry experts monitor wildfire susceptibility by assessing canopy moisture content using infrared remote sensing. Vegetation moisture indices calculated from short-wave infrared bands help evaluate watershed health and drought. Visible spectrum reflectance is primarily governed by leaf pigments rather than internal water content absorption. Near-infrared reflectance is mainly controlled by internal mesophyll cell scattering rather than water absorption. Option C is correct because the short-wave infrared spectrum specifically governs leaf water content reflection.
- Subject
- Engineering
- Category
- Civil Engineering
- Topic
- —
- Difficulty
- medium
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