elements-of-remote-sensing civil-engineering question and answers -Page 4

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Elements of Remote Sensing problems

1. Pick up the correct statement from the following :
Options
A. Topology describes the geometric characteristic of objects which do not change under transformations and are independent of any coordinate system
B. Topological characteristics of an object are independent of scale measurement
C. The three elements of topology are adjacency, containment, and connectivity
D. All of these

3. Which one of the following statements is correct?
Options
A. During the day, earth reflects solar radiation
B. During the day earth reflects both solar radiation the emission from its surface
C. During the night, earth emits radiation from its surface
D. All of these

4. "An Electromagnetic wave falls on to a boundary between two loss 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 :
Options
A. Fresnel reflection
B. Fresnel refraction
C. Snell's law
D. None of these

5. The part radiation due to scattered/diffused radiation entering the field of view of a remote sensor other than that from the required target,
Options
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

7. Pick up the correct statement from the following:
Options
A. The surface defined by the locus of points having same phase, is called a wave front.
B. The wave whose surface of constant phase are parallel planes, is known as a plane wave.
C. The relative phase difference between the waves is important and not the absolute phase of a point on the wave
D. All of these

9. The value of energy quantum for radiation of any frequency is proportional to :
Options
A. the frequency
B. the reciprocal of the energy
C. the square of the frequency
D. the square root of the frequency

10. Pick up the correct definition from the following with response to GIS.
Options
A. Common boundry between two areas of a locality is known as adjacency.
B. The area features which are wholly contained within another area feature, is known so containment.
C. The geometric property which describes the linkage between line features is defined as connectivity.
D. All of these.

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