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Civil Engineering - Elements of Remote Sensing

Exercise : Elements of Remote Sensing - Section 2
46.
The changes in the reflectivity/emis-sivity with time, is called :
spectral variation
spatial variation
temporal variation
None of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
47.
According to the Snell's law if an electromagnetic wave is incident in a medium (refractive index n1) on an other medium (refractive index m2);
the angle of incidence is equal to the angle of refraction
the angle of refraction (θr) is given by
Both (a) and (b)
neither (a) nor (b)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
48.
Pick up the correct statement from the following:
Phytoplankton contains photosyn-thetically active pigment.
An increase of phytoplankton increases the back scattering in the green region
An increase of phytoplankton absorbs the bule region rapidly
An increase of phytoplankon decreases the back scattering in the green region
Answer: Option
Explanation:
No answer description is available. Let's discuss.
49.
Which one of the following factors does not affect the scale of the air photographs :
focal length
flying height
ground elevation
None of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
50.
While propagating through homogeneous, isotropic media,
directions of both the fields are orthogonal
both the fields are at right angles to the direction of propagation.
both (a) and (b)
niether (a) nor (b)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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