Which of the following is a passive remote sensing system?
A. Radar
B. LiDAR
C. Optical satellite sensors
D. SONAR
Answer: Option C
Solution (By Examveda Team)
Optical satellite sensors are passive as they rely on sunlight reflected from the Earth.Radar and LiDAR are active systems because they emit their own signals.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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