A. Directions of both the fields are orthogonal
B. Both the fields are at right angles to the direction of propagation
C. Both A. and B.
D. Neither A. nor B.
✅ The correct answer is option C.
Elements of Remote Sensing MCQs
12. “An Electromagnetic wave falls on to a boundary between two losses less homogeneous media with different refractive indices, a part of the wave is reflected back to the incident medium and the rest is transmitted on to the second media”. This phenomenon is known as___________________?
A. Fresnel reflection
B. Fresnel refraction
C. Snell’s law
D. None of these
✅ The correct answer is option A.
13. The arrangement of terrain features which provides attributes: the shape, size and texture of objects, is called_________________?
A. Spectral variation
B. Spatial variation
C. Temporal variation
D. None of these
✅ The correct answer is option B.
14. A and B are two towers of equal height diametrically opposite on either side of the nadir point, at 3 km and 5 km distances. Which one of the following statements is correct?
A. Height displacement of A will be less than that of B
B. Height displacement of B will be less than that of A
C. Height displacement of A and B is equal
D. Height displacement of A and B will be towards each other
✅ The correct answer is option A.
15. For interpolation of satellite data used for monitoring dynamic changes that occurs on the earth surface, the most suitable orbit for the satellite is______________?
A. Circular orbit
B. Sun-synchronous orbit
C. Near polar orbit
D. None of these
✅ The correct answer is option B.
16. The refractive index of the ocean water_______________?
A. Increases with salinity
B. Increases with temperature
C. Decreases with salinity
D. Decreases with temperature
✅ The correct answer is option A.
17. The most widely used antenna in GPS is_______________?
A. Parabolic antenna
B. Microstrip antenna
C. Horn antenna
D. Slotted antenna
✅ The correct answer is option B.
18. The value of energy quantum for radiation of any frequency is proportional to________________?
A. The frequency
B. The reciprocal of the energy
C. The square of the frequency
D. The square root of the frequency
✅ The correct answer is option A.
19. If electric permittivity and magnetic permeability of the medium are respectively and , then the velocity (Cm) of the electromagnetic wave in the medium is given by___________________?
A. Cm = 1/
B. Cm
C. Cm
D. None of these
✅ The correct answer is option B.
20. If flying height of a spacecraft is H, the length of air base is B and the parallax difference between two points is dp, then the difference in height___________________?
A. h = dp/(B/H)
B. h = (B/H) dp
C. h = dp/(H/B)
D. h = (H/B) dp
✅ The correct answer is option A.