8. Identification of crops is affected by:
A. the spectral characteristics of the sensor
B. the spatial characteristics of the sensor
C. the radio metric characteristics of the sensor
D. All of these

---

9. Remote sensing techniques makes use of the properties of emitfed, reflected or diffracted by the sensed objects:
A. electric waves
B. sound waves
C. electromagnetic waves
D. wind waves

---

10. Remote sensing techniques are being usefully employed for the purpose of:
A. improving natural resource management
B. land use
C. protection of the environment
D. All of these

---

11. The interaction of the electromagnetic radiation produced with a specific wave length to illuminate a target on the terrain for studying its scattered radiance, is called:
A. passive remote sensing
B. active remote sensing
C. neutral remote sensing
D. None of these

---

12. Which one of the following statements regarding remote sensing is correct.
A. The interaction of the electromagnetic radiation with the target
B. The emission of electromagnetic radiation from the target
C. both (a) and (b)
D. Neither (a) nor (b)

---

13. The entire range of the electromagnetic spectrum spans a large spectrum of wave lengths varying from:
A. 10 - 10 to 106m
B. 10-8 to 106m
C. 10 -10 to 1010m
D. 10 -8 to 108m

---

14. Pick up the correct statement from the following:
A. The wave length of gamma rays is 10 -10m.
B. The wave length of radio rays is 106m
C. The visible length occupies a small portion of the electromagntic spectrum extending roughly from 0.4p.m to 0.7pm wave length.
D. All of these

---