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Civil Engineering - Elements of Remote Sensing

Exercise : Elements of Remote Sensing - Section 2
31.
Pick up the correct statement from the following :
Frequency is the number of wave crests passing a fixed point in one second
Frequency of a wave is measured in Hertz (Hz)
Amplitude of a wave is the height of its crust from the mid-point.
The square of the amplitude is proportional to the energy transported by the wave.
All of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
32.
If electric permittivity and magnetic permeability of the medium are respectively ε and μ, then the velocity (Cm) of the electromagnetic wave in the medium is given by :
None of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
33.
Earth observations from a satellite platform provides :
synoptic view of a large area
constant solar zenith angles and similar illumination conditions.
repetitive observations of the same area with intervals of a few minutes to a few weeks
All of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
34.
Due to scan geometery of a satellite sensor:
the off-nadir resolution is degraded
the ground distance swept by the senor, IFOV is proportional to sec2θ, where θ is the angle of scan measured from the nadir
the details towards the edge of the scan get compressed
All of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
35.
'A time varrying electric field produces a magnetic field.' This phenemenon is called:
Hertz's law
Ampere Maxwell's law
Faraday's law
Kirchoff s law
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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