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- Question
If electric permittivity and magnetic permeability of the medium are respectively ? and ?, then the velocity (Cm) of the electromagnetic wave in the medium is given by :
Options- A.
- B.
- C.
- D. None of these
- Correct Answer
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- 1. The maximum sun's radiation occurs around:
Options- A. 0.4 ?m wave length
- B. 0.55 ? wave length
- C. 0.7 ? wave length
- D. None of these Discuss
- 2. Pick up the correct statement from the following:
Options- 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 Discuss
- 3. Pick up the correct statement from the following :
Options- 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 Discuss
- 4. Repetitive observations of the same area at equal interval of time, are useful to monitor the dynamic phenomena :
Options- A. Cloud evolution
- B. Vegetative cover
- C. Snow cover
- D. Forest fires
- E. All of these Discuss
- 5. The reflectance from a surface is called specular reflection if it follows: .
Options- A. Snells's law
- B. Lambert's cosine law
- C. Planktan's law
- D. All of these Discuss
- 6. Consider the following statements regarding the satellite imaging :
1. The satellite orbit is fixed in the inertial space
2. During successive across-track imaging, the earth rotates beneath the sensor
3. The satellite images a skewed area
Which one of the following statements is/are correct?
Options- A. 1, 2, 3
- B. 1, 3
- C. 2, 3
- D. 1, 2 Discuss
- 7. The ratio of the total solar radiant energy returned by a planetary body to the total radiant energy incident on the body, the called:
Options- A. reflectance
- B. reflectance factor
- C. albedo
- D. none of these Discuss
- 8. Formation of snow occurs if the cloud temperature is
Options- A. just above the freezing point
- B. at the freezing point
- C. below the freezing point
- D. None of these Discuss
- 9. 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
- 10. 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
Elements of Remote Sensing problems
Search Results
Correct Answer: 0.55 ? wave length
Correct Answer: All the these
Correct Answer: All the above
Correct Answer: All of these
Correct Answer: Snells's law
Correct Answer: 1, 2, 3
Correct Answer: albedo
Correct Answer: below the freezing point
Correct Answer: None of these
Correct Answer: All of these
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