Question

The interaction of the electromagnetic radiation produced by an instrument with a specific wavelength to illuminate a target on the terrain for studying its scattered radiance is called:

• A. \( \text{Passive remote sensing} \)
• B. \( \text{Active remote sensing} \)
• C. \( \text{Global positioning system} \)
• D. \( \text{Neutral remote sensing} \)

Hint:

Remember that 'active' means the sensor provides its own light source.

Answer 1

The Correct Option is B

Active remote sensing involves the use of an instrument that emits its own electromagnetic radiation towards a target and then measures the radiation that is scattered or reflected back from the target. This is in contrast to passive remote sensing, which relies on detecting naturally available energy.