Remote Sensing — Chapter Summary
ICSE · Class 12 · Geography
Summary of Remote Sensing for ICSE Class 12 Geography. Part of the ICSE Class 12 Geography syllabus. Remote sensing is the science of obtaining.
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Overview
Remote sensing is the science of obtaining information about objects or areas without direct contact. It works by detecting reflected or emitted energy through sensors such as the human eye, camera, radiometer, scanner, radar, and satellite instruments. In geography, it is important because it provi
Key Concepts
Remote sensing means acquiring information about
Remote sensing means acquiring information about a phenomenon that is not in intimate contact with the information collecting device. It includes sens
Four basic classes are radiometer
Four basic classes are radiometer, audiometer, magnetometer, and gravimeter. Radiometer measures energy in parts of the electromagnetic spectrum; audi
Electromagnetic waves travel at about 3
Electromagnetic waves travel at about 3,00,000 km per second. Frequency is measured in hertz, and wavelength and frequency are inversely related. The
Human eyes respond to wavelengths between
Human eyes respond to wavelengths between 4,000 and 7,000 angstroms. Visible light extends from about 0.4 to 0.7 microns. Infrared extends from about
Passive systems use natural energy reflected
Passive systems use natural energy reflected or emitted from the target, such as ordinary photography. Active systems generate their own energy and re
Learning Objectives
- Define remote sensing and understand its basic idea.
- Recognize the main classes of remote sensors and their uses.
- Understand the electromagnetic spectrum and the relation between wavelength and frequency.
- Distinguish between passive and active sensing systems.
- Explain atmospheric windows and their importance in sensing.
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Sources & Official References
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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