Civil Engineering - Elements of Remote Sensing

Exercise :: Elements of Remote Sensing - Section 2

36. 

Which one of the following quantities forms the basis of radiometery?

A. Radiant energy (Q)
B. Radiant flux (φ)
C. Radiant intensity (I)
D. Radiance (L)
E. All of these

Answer: Option E

Explanation:

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37. 

The maximum sun's radiation occurs around:

A. 0.4 μm wave length
B. 0.55 μ wave length
C. 0.7 μ wave length
D. None of these

Answer: Option B

Explanation:

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38. 

Pick up the correct statement from the following :

A. The minimum frequency of light for which no electrons are emitted, is called threshold frequency.
B. Polarising angle of glass is 57°.5
C. At the polarising angle, the reflected and refracted rays are orthogonal
D. All the above

Answer: Option D

Explanation:

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39. 

Pick up the correct statement from the following:

A. The refractive index of a medium varies according to the wavelength of the radiation,
B. The variation of the refractive index with wave length, is called dispersion,
C. The splitting of colours of white light by passing through a prism, is caused due to dispersion.
D. All the these

Answer: Option D

Explanation:

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40. 

Which one of the following attributes is not associated with digital maps

A. colour
B. symbology
C. legends
D. south arrow

Answer: Option D

Explanation:

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