Civil Engineering - Elements of Remote Sensing
Exercise :: Elements of Remote Sensing - Section 1
| 26. |
The value of energy quantum for radiation of any frequency is proportional to : |
| A. |
the frequency | | B. |
the reciprocal of the energy | | C. |
the square of the frequency | | D. |
the square root of the frequency |
Answer: Option A
Explanation:
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| 27. |
The phase difference of the waves 1 and 2 at A in the given figure is : |
Answer: Option B
Explanation:
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| 28. |
A perfectly black body : |
| A. |
is a diffuse emitter | | B. |
absorbs all the radiations of every wave lengths | | C. |
emits power of every wave length | | D. |
All the above |
Answer: Option D
Explanation:
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| 29. |
Pick up the correct statement from the following : |
| A. |
When the electric field oscillates in the direction of the electric vector, a plane polarised wave is formed. | | B. |
When the electric vector is in the plane of incidence, vertical polarisation is formed. | | C. |
When the electric vector is at right angles to the plane of incidence, horizontal polarization wave is formed. | | D. |
The plane containing the incident ray and normal to the reflecting surface at the point of incidence is called the plane of incidence. | | E. |
All of these |
Answer: Option E
Explanation:
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| 30. |
Pick up the correct statement from the following: |
| A. |
Phase of a wave is expressed as a fraction of a period with respect to a refrence | | B. |
Phase is usually specified by angular measure with one period being 360° | | C. |
The reference for finding the phase of a wave is taken from the previous passage through zero from the negative to the positive direction. | | D. |
All of these |
Answer: Option D
Explanation:
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