1. The normal altitude of GPS satellite is about________________?
A. 16,200 km
B. 20,200 km
C. 24,400 km
D. 36,100 km
✅ The correct answer is option B.
Elements of Remote Sensing MCQs
2. The reflection of solar energy is characterised by the water content in the leaf, in the reflective optical infrared______________?
A. Visible (0.4 –
B. Near-IR (0.7 –
C. Short wave-IR (1.3 –
D. None of these
✅ The correct answer is option C.
3. A passive sensor uses ________________?
A. Sun as the source of energy
B. Flash light as a source of energ
C. Its own source of energy
D. None of these
✅ The correct answer is option A.
4. Orbital radius of GPS satellites is approximately ___________________?
A. 15,200 km
B. 26,600 km
C. 18,400 km
D. 36,000 km
✅ The correct answer is option B.
5. Coherence of two electromagnetic waves takes place if their phase difference is_________________?
A. Constant in time
B. Constant in space
C. Constant in time and space
D. None of these
✅ The correct answer is option C.
6. Geodimeter is based on_________________?
A. Propagation of modulated light waves
B. Propagation of infrared radiation
C. The visible light as carrier with frequency of the order of 5 × 1014 Hz
D. High frequency radio waves
✅ The correct answer is option A.
7. In case of reflection and refraction of electromagnetic radiation ?
A. Angle of incidence = angle of refraction
B. Angle of incidence = angle of reflection
C. Angle of refraction = sum of the angles of incidence and refraction
D. All the above
✅ The correct answer is option B.
8. 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.
✅ The correct answer is option C.
9. The part radiation due to scattered/diffused radiation entering the field of view of a remote sensor other than that from the required target_________________?
A. Reduces the contrast of the image and also its sharpness
B. Increases the contrast of the image but reduces the sharpness
C. Increases both the contrast and sharpness
D. Reduces the contrast but increases the sharpness
✅ The correct answer is option A.
10. According to the Snell’s law if an electromagnetic wave is incident in a medium (refractive index n1) on another medium (refractive index m2)________________?
A. The angle of incidence is equal to the angle of refraction
B. The angle of refraction r) is given by sin i
C. Both A. and B.
D. Neither A. nor B.
✅ The correct answer is option B.