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- Question
Which one of the following statement is incorrect regarding the electromagnetic radiation?
Options- A. These are produced by the motion of electric charge
- B. The oscillation of charged particles sets up changing electric fields.
- C. The changing electric fields induce the changing magnetic fields in the surrounding medium.
- D. None of these
- Correct Answer
- None of these
- 1. Which one of the following attributes is not associated with digital maps
Options- A. colour
- B. symbology
- C. legends
- D. south arrow Discuss
- 2. In GPS, receivers are used are ;
Options- A. electronic clocks
- B. atomic clocks
- C. quartz clocks
- D. mechanical clocks Discuss
- 3. If flying height of a spacecraft is H, the length of air base is B and the parallax difference between two points is dp, then the difference in height
Options- A.
- B.
- C.
- D.
Discuss
- 4. Electromagnetic spectrum contains :
Options- A. gamma rays (wave length < 10-10 m)
- B. ultraviolet rays (wave length < 10-6 m)
- C. infrared rays (wave length < 10-4 m)
- D. radio rays (wave length > 1 m)
- E. All of these Discuss
- 5. Which one of the following factors does not affect the scale of the air photographs :
Options- A. focal length
- B. flying height
- C. ground elevation
- D. None of these Discuss
- 6. Which one of the following statements is correct?
Options- A. Each satellite of the GPS system transmits two L band signals.
- B. The two L band signals are modulated by the Pseudorandom binary codes (PN).
- C. The GPS receiver reads the specific code of the satellite.
- D. The PN code determines the time taken by the receiver to reach the receiver which is converted into distance
- E. All of these Discuss
- 7. In sun light, water rich in phytoplanktons appears :
Options- A. red
- B. green
- C. brown
- D. blue Discuss
- 8. Pick up the correct statement from the following:
Options- A. Water molecules and salt-ions in the ocean scatter the lower wave length more
- B. An increase in the back scattering coefficient with shorter wave length gives a deep blue colour for clear oceanic water
- C. The ratio of the upwelling irradiance just below the surface and downwelling irradiance just above the surface is called reflectance ratio.
- D. All of these Discuss
- 9. The semi-infinite snow albedo is proportional to the square root of the grain radius :
Options- A. in the 0.2 to 0.4 ?m wave length region
- B. in the 0.4 to 0.8 ?m wave length region
- C. in the 0.8 to 1.2 ?m wave length
- D. None of these Discuss
- 10. For perfect coherent radiation, which one of the following statement is correct?
Options- A. Both the waves must have single frequencies
- B. The directions of motion of both waves are parallel.
- C. The waves must be collimated
- D. All of these Discuss
Elements of Remote Sensing problems
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Correct Answer: south arrow
Correct Answer: quartz clocks
Correct Answer:
Correct Answer: All of these
Correct Answer: None of these
Correct Answer: All of these
Correct Answer: green
Correct Answer: All of these
Correct Answer: in the 0.4 to 0.8 ?m wave length region
Correct Answer: All of these
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