Correct option is D
The reflectance properties of fresh and pure snow are as follows:
Is very high in the visible region (a):
Fresh snow reflects a large percentage of sunlight in the visible spectrum, making it appear bright white. Reflectance in this region can be as high as 80–90%.
Remains low for longer wavelengths (b):
In the thermal infrared region, the reflectance of snow decreases significantly, as snow absorbs more of the longer wavelengths.
Falls off steeply in the near-IR region (c):
Snow reflectance drops sharply in the near-infrared (NIR) region due to increased absorption properties in this spectrum.
