Geodimeter is based on : propogation of modulated light waves propogation of inf

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Question
Geodimeter is based on :
Options
A. propogation of modulated light waves
B. propogation of infrared radiation
C. the visible light as carrier with frequency of the order of 5 x 10¹⁴Hz
D. high frequency radio waves.

Correct Answer

propogation of modulated light waves

Elements of Remote Sensing problems

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1. DGPS is based on the concept that bais errors in the position of locations in a given local area, are same if their distances are within
Options
A. 25 km
B. 50 km
C. 75 km
D. 100 km
E. 1250 km

2. Pick up the correct statement from the following :
Options
A. Frequency is the number of wave crests passing a fixed point in one second
B. Frequency of a wave is measured in Hertz (Hz)
C. Amplitude of a wave is the height of its crust from the mid-point.
D. The square of the amplitude is proportional to the energy transported by the wave.
E. All of these

3. Which one of the following statement is correct?
Options
A. Radiant energy expressed in Joules, is the energy associated with electromagnetic radiation
B. The rate of transfer of radiant energy is called flux and is expressed in watts.
C. The radiant energy which falls upon a surface, is termed as irradiance.
D. The radiant energy which falls away from the surface is termed as radient exitance and is measured in Wm^-2
E. All of these

4. Pick up the correct statement from the following:
Options
A. For the same feature, the photograph taken from the satellite vertically above the aircraft, the height displacement is lesser than the the aerial photograph.
B. The scale of the aerial photograph depends upon the scale of the topography
C. The feature at the principal point has no height displacement.
D. The scale of the topography of regions of higher elevation with the same flying height, is larger than that of the area of lower elevation.
E. All of the above

5. 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);
Options
A. the angle of incidence is equal to the angle of refraction
B. the angle of refraction (?r) is given by
C. Both (a) and (b)
D. neither (a) nor (b)

7. Who coined the term, 'Remote sensing'.
Options
A. Evelyn L. Pruitt, a geographer
B. Gaspard Felix Tournachon, a French scientist
C. Wilbur Wright, an Italian sciencist
D. None of these

9. The optical property of a water body depends on:
Options
A. absorption by the disolved material
B. absorption by the suspended particulate matter
C. scattering by the surpended particulate matter
D. All of these

10. Earth observations from a satellite platform provides :
Options
A. synoptic view of a large area
B. constant solar zenith angles and similar illumination conditions.
C. repetitive observations of the same area with intervals of a few minutes to a few weeks
D. All of these

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