A passive sensor uses ________________?

Related Mcqs:

1. sensor IFOV is proportional to_________________?

   A. sin2
   B. cos2
   C. sec2
   D. tan2

2. 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

3. 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

4. The basic requirement of any sensor system is___________________?

   A. Radiometric resolution
   B. Spatial resolution
   C. Spectral resolution
   D. All of these

5. 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.

6. Pick up the correct statement from the following ?

   A. For the same feature, the photograph taken from the satellite vertically above the aircraft, the height displacement is lesser than the aerial photograph
   B. The scale of the aerial photograph depends upon the scale of the topography
   C. The feature at the principal point has no height displacement
   D. All of the above

7. The optical property of a water body depends on ?

   A. Absorption by the dissolved material
   B. Absorption by the suspended particulate matter
   C. Scattering by the suspended particulate matter
   D. All of these

8. The code based GPS receivers are generally used for_________________?

   A. Vehicle tracking
   B. Land navigation
   C. Trans movement
   D. All of these

9. 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

10. Pick up the correct statement from the following ?

    A. Permeability is a measure of conducting the magnetic lines of force in the material
    B. Permeability is a measure of the extent to which magnetic lines of force can penetrate a medium
    C. Permeability is expressed as the ratio of the magnetic flux density B. to the field strength of the magnetizing field
    D. All of these