A. Reflectance
B. Reflectance factor
C. Albedo
D. None of these
✅ The correct answer is option C.
Elements of Remote Sensing MCQs
32. 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
✅ The correct answer is option B.
33. The instruments which provide electromagnetic radiation of specified wave length or a band of wave lengths to illuminate the earth surface are called________________?
A. Sensors
B. Passive sensors
C. Active sensors
D. None of these
✅ The correct answer is option C.
34. Due to perturbation of the orbit, satellite orbit parameters are frequently updated on measurements carried out by its_______________________?
A. Six ground stations
B. Five ground stations
C. Four ground stations
D. Three ground stations
✅ The correct answer is option B.
35. In GPS, receivers used are___________________?
A. Electronic clocks
B. Atomic clocks
C. Quartz clocks
D. Mechanical clocks
✅ The correct answer is option C.
36. Electromagnetic radiation_______________?
A. Produces a time varying magnetic field and vice versa
B. Once generated, remains self-propagating
C. Is capable to travel across space
D. All of these
✅ The correct answer is option D.
37. Critical angle of electromagnetic radiation takes place if__________________?
A. Angle of incidence is equal to angle of refraction
B. Angle of incidence is greater than the angle of refraction
C. Angle of incidence is equal to 90°
D. Angle of refraction is equal to 90°
✅ The correct answer is option D.
38. The code based GPS receivers are generally used for_________________?
A. Vehicle tracking
B. Land navigation
C. Trans movement
D. All of these
✅ The correct answer is option D.
39. Earth observations from a satellite platform provide____________?
A. Synoptic view of a large area
B. Constant solar zenith angles and similar illumination conditions
C. Repetitive observations of the same area with intervals of a few minutes to a few weeks
D. All of these
✅ The correct answer is option D.
40. Which one of the following errors is produced by platform characteristics of the sensor ?
A. Altitude variation
B. Altitude
C. Orbit drift
D. All of these
✅ The correct answer is option D.