What is the principle of Synthetic Aperture Radar (SAR) in remote sensing?
A. Uses thermal energy emitted by objects
B. Measures reflectance of visible light
C. Uses microwave pulses to create high-resolution images
D. Detects magnetic fields
Answer: Option C
Solution (By Examveda Team)
SAR sends microwave pulses and processes the returned signals to generate detailed images regardless of weather or lighting.Widely used in terrain and deformation studies.This Question Belongs to Geological Engineering >> Remote Sensing And GIS In Geological Engineering
What is the primary principle behind remote sensing?
A. Collecting data by direct contact
B. Observing Earth from a distance using sensors
C. Drilling to collect soil samples
D. Using underground radar
Which of the following is an active remote sensing technique?
A. Aerial photography
B. LiDAR (Light Detection and Ranging)
C. Thermal infrared imaging
D. Multispectral scanning
Which GIS component is responsible for spatial data analysis?
A. Hardware
B. Software
C. Data
D. People
In remote sensing, what does spectral resolution refer to?
A. Size of the area covered
B. Ability to distinguish between different wavelengths
C. Number of pixels in the image
D. Time between image acquisitions
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