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Elements of Remote Sensing
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Question
The semi-infinite snow albedo is proportional to the square root of the grain radius :
Options
A. in the 0.2 to 0.4 ?m wave length region
B. in the 0.4 to 0.8 ?m wave length region
C. in the 0.8 to 1.2 ?m wave length
D. None of these
Correct Answer
in the 0.4 to 0.8 ?m wave length region
Elements of Remote Sensing problems
Search Results
1. Pick up the correct statement from the following:
Options
A. Water molecules and salt-ions in the ocean scatter the lower wave length more
B. An increase in the back scattering coefficient with shorter wave length gives a deep blue colour for clear oceanic water
C. The ratio of the upwelling irradiance just below the surface and downwelling irradiance just above the surface is called reflectance ratio.
D. All of these
Show Answer
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Correct Answer: All of these
2. In sun light, water rich in phytoplanktons appears :
Options
A. red
B. green
C. brown
D. blue
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Correct Answer: green
3. Which one of the following statements is correct?
Options
A. Each satellite of the GPS system transmits two L band signals.
B. The two L band signals are modulated by the Pseudorandom binary codes (PN).
C. The GPS receiver reads the specific code of the satellite.
D. The PN code determines the time taken by the receiver to reach the receiver which is converted into distance
E. All of these
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Correct Answer: All of these
4. Which one of the following statement is incorrect regarding the electromagnetic radiation?
Options
A. These are produced by the motion of electric charge
B. The oscillation of charged particles sets up changing electric fields.
C. The changing electric fields induce the changing magnetic fields in the surrounding medium.
D. None of these
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Correct Answer: None of these
5. Which one of the following attributes is not associated with digital maps
Options
A. colour
B. symbology
C. legends
D. south arrow
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Correct Answer: south arrow
6. For perfect coherent radiation, which one of the following statement is correct?
Options
A. Both the waves must have single frequencies
B. The directions of motion of both waves are parallel.
C. The waves must be collimated
D. All of these
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Correct Answer: All of these
7. Snow albedo is affected by :
Options
A. wave length
B. grain size
C. solar zenith angle
D. snow pack thickness
E. All of these
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Correct Answer: All of these
8. The energy transported by the electromagnetic wave is proportional to :
Options
A. the altitude of the wave
B. the square of the altitude of the wave
C. the cube of the altitude of the wave
D. the square roof of the amplitude
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Correct Answer: the square of the altitude of the wave
9. Pick up the correct statement from the following:
Options
A. The wave length of gamma rays is 10
-10
m
B. The wave length of radio rays is 10
6
m
C. The visible length occupies a small portion of the electromagntic spectrum extending roughly from 0.4 ? m to 0.7?m wave length.
D. All of these
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Correct Answer: All of these
10. Which one of the following is incorrect statement? While passing through the atmosphere, the solar radiation,
Options
A. remains unaffected
B. gets scattered
C. gets absorbed partially
D. None of these
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Correct Answer: remains unaffected
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