ELEMENTS OF REMOTE SENSING QUIZ

Which one of the following parameters is considered to determine the reflectance of a vegetation canopy?

Look angle

All of these

Solar zenith angle

Azimuth angle

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Orbital radius of GPS satellites is approximately:

18,400 km

36,000 km

26,600 km

15,200 km

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'A time varying electric field produces a magnetic field.' This phenomenon is called:

Hertz's law

Ampere Maxwell's law

Kirchoff’s law

Faraday's law

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Spatial variation in horizontal and vertical directions is caused due to:

Biological weathering of rocks

All of these

Chemical weathering of rocks

Physical weathering of rocks

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According to the Snell's law if an electromagnetic wave is incident in a medium (refractive index n₁) on another medium (refractive index m₂);

Neither (A) nor (B)

The angle of refraction (θr) is given by sin θ₂ = (n₁/n₂) sin θi

The angle of incidence is equal to the angle of refraction

Both (A) and (B)

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Which one of the following geometric errors of satellite sensors is random?

Altitude variation

Scan skew

Panoramic distortion

Earth rotation

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Leaf reflectance depends primarily on:

Internal cell structure

The pigments

Equivalent water content

All of these

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The reflection of solar energy is characterized by the water content in the leaf, in the reflective optical infrared:

None of these

Visible (0.4 - 0.7 μm) region

Short wave-IR (1.3 - 2.7 μm) region

Near-IR (0.7 - 1.3 μm) region

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The spectral region of the electromagnetic radiation which passes through the atmosphere without much attenuation is known as:

Ozone window

Black hole

Ozone hole

Atmospheric window

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Pick up the correct definition from the following with response to GIS.

The area features which are wholly contained within another area feature, is known so containment

The geometric property which describes the linkage between line features is defined as connectivity

All of these

Common boundary between two areas of a locality is known as adjacency

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