Civil Engineering - Elements of Remote Sensing

Exercise :: Elements of Remote Sensing - Section 3

21. 

Pick up the correct statement from the following:

A. Photography was developed in 1826
B. Balloons were used as stable platform for aerial photography in 1903
C. The first aerial photography from an aerocraft was made by Willeur Wright in 1909 in Italy.
D. All of these

Answer: Option D

Explanation:

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22. 

Pick up the correct statement from the following:

A. Electromagnetic wave is composed of electric and magnetic fields
B. Electric and magnetic fields of electromagnetic wave remain mutually orthogonal and transverse to the direction of propagation.
C. If the electromagnetic wave moves in the z-direction, its electric vector remains in the XY plane along any direction.
D. Polirization defines the orientation of the fields
E. All of these

Answer: Option E

Explanation:

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23. 

The information system is the chain of the following operations,
1. Collection of data
2. Planning the observations
3. Analysis of data
4. Decision making process Which one of the chains is correct ?

A. 4, 1, 2, 3
B. 2, 1, 3, 4
C. 3, 2, 1, 4
D. 1, 3, 4, 2

Answer: Option B

Explanation:

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24. 

Polarising angle (i) and refractive index (μ) of the reflecting surface are related by:

A. sin i = μ
B. cos i = μ
C. tan i = μ
D.

Answer: Option C

Explanation:

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25. 

Pick up the incorrect statement regarding the optical infrared region of the electromagnetic spectrum from the following :

A. visible region, 0.4 μm - 0.7 μm
B. short wave infrared region, 0.7 μ m - 1.5 μm
C. near infrared region, 1.5 μ m - 3.0 μm
D. microwave infrared region, 3.0 μ m - 8.0 μm

Answer: Option B

Explanation:

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