Question

Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).
Assertion (A): A remote sensing system that possesses only a sensor and depends on an external source to irradiate the target to be sensed is called an active remote sensing system.
Reason (R): Synthetic Aperture Radar uses microwave band to estimate soil moisture.
In light of the above statements, choose the correct answer from the options given below.

• A. Both (A) and (R) are true and (R) is the correct explanation of (A).
• B. Both (A) and (R) are true but (R) is NOT the correct explanation of (A).
• C. (A) is true but (R) is false.
• D. (A) is false but (R) is true.

Hint:

Active Remote Sensing = Own energy source (e.g., Radar, LiDAR).
Passive Remote Sensing = External energy source (e.g., Sunlight/thermal emission).
Microwaves are highly sensitive to the soil water dielectric constant, making radar excellent for estimating soil moisture.

Answer 1

The Correct Option is D