Discussion
What is the wavelength of visible region in the electromagnetic spectrum ?
Answer: A
The visible region spans about 0.4 - 0.7 μm.
Human eyes respond to wavelengths from about 0.4 μm (violet) to 0.7 μm (red), that is 400-700 nm. In remote sensing, the blue, green and red bands of sensors all lie in this range.
0.7-1.0 μm is the near infrared, important for vegetation studies. 1.0-3.0 μm is the shortwave infrared, and 3.0-3.5 μm lies in the mid infrared. None of these is visible light.
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