Which remote sensing method uses the principle of emitting sound waves and recording their echoes?
A. LiDAR
B. Radar
C. SONAR
D. Thermal imaging
Answer: Option C
Solution (By Examveda Team)
SONAR (Sound Navigation and Ranging) uses sound waves to detect underwater objects and topography.It is distinct from LiDAR and Radar which use light and microwaves respectively.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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