Question

Which statements is/are correct? A. The basic components of remote sensing system are target, energy source, transmission path and sensors. B. The sensors used in sensing are active and passive. C. Remote sensing has only one resolution i.e. spectral resolution. D. NOAA was the first operational remote sensing satellite system. E. In remote sensing the sensors are used to detect EMR.

• A. A, B and C only
• B. A, B, C and D only
• C. A, B, D and E only
• D. A, B, C, D and E

Hint:

Remote sensing has different resolutions such as spatial, spectral, temporal and radiometric resolution.

Answer 1

The Correct Option is C

Concept:
Remote sensing uses sensors to detect electromagnetic radiation from objects without physical contact.

Step 1: Check statement A.
A remote sensing system includes energy source, target, transmission path and sensor. \[ A \text{ is correct} \]

Step 2: Check statement B.
Remote sensing sensors are of two types: \[ \text{Active sensors} \] and \[ \text{Passive sensors} \] \[ B \text{ is correct} \]

Step 3: Check statement C.
Remote sensing does not have only spectral resolution. It also includes spatial, temporal and radiometric resolution. \[ C \text{ is incorrect} \]

Step 4: Check statements D and E.
NOAA is associated with operational remote sensing satellite systems. Sensors are used to detect electromagnetic radiation. \[ D \text{ and } E \text{ are correct} \] Thus, the correct statements are: \[ A,B,D,E \] \[ \therefore \text{Correct Answer is (C)} \]