Related Mcqs:

1. For C band Synthetic Aperture Radar (SAR) with Doppler band width of 1300 Hz, the coherence length loch is_____________?

   A. 130 km
   B. 230 km
   C. 250 km
   D. 500 km

2. 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

3. 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

4. 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

5. 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

6. “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

7. Pick up the correct statement from the following?

   A. The minimum frequency of light for which no electrons are emitted, is called threshold frequency
   B. Polarising angle of glass is 57.5°
   C. At the polarising angle, the reflected and refracted rays are orthogonal
   D. All the above

8. 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

9. Which one of the following helps to identify the objects on the earth surface ?

   A. Atmospheric window
   B. Signature
   C. Radiometric error
   D. None of these

10. Pick up the correct statement from the following_________________?

    A. When the electric field oscillates in the direction of the electric vector, a plane polarised wave is formed
    B. When the electric vector is in the plane of incidence, vertical polarisation is formed
    C. When the electric vector is at right angles to the plane of incidence, horizontal polarization wave is formed
    D. All of these