Civil Engineering - Elements of Remote Sensing
Exercise :: Elements of Remote Sensing - Section 1
6.
Which one of the following frequency regions is a part of sun's radiation?
A. Ultraviolet frequency region B. Visible frequency region C. Infrared frequency region D. Radio frequency region E. All of these
Answer: Option E
Explanation:
7.
The instruments which provide electromagnetic radiation of specified wave length or a band of wave lengths to illuminate the earth surface, are called :
A. sensonrs B. passive sensors C. active sensors D. None of these
Answer: Option C
Explanation:
8.
Due to pertubation of the orbit, satellite orbit parameters are frequently updated on measurements carried out by its
A. six ground stations B. five ground stations C. four ground stations D. three ground stations
Answer: Option B
Explanation:
9.
Coherence of two electromagnetic waves takes place if their phase difference is :
A. constant in time B. constant in space C. constant in time and space D. None of these
Answer: Option C
Explanation:
10.
The part radiation due to scattered/diffused radiation entering the field of view of a remote sensor other than that from the required target,
A. reduces the contrast of the image and also its sharpness B. increases the contrast of the image but reduces the sharpness C. increases both the contrast and sharpness D. reduces the contrast but increases the sharpness
Answer: Option A
Explanation:
