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Questions and Answers
What is remote sensing?
What is remote sensing?
- Acquiring information about the earth's surface from a distance (correct)
- Direct physical contact with the earth's surface to collect information
- Measuring radiation by being in close proximity to the earth's surface
- Observing the earth's surface without any technology
What interacts with the objects on the surface of the earth in remote sensing?
What interacts with the objects on the surface of the earth in remote sensing?
- Electromagnetic radiation (correct)
- Sound waves
- Ultraviolet radiation
- Infrared light
What forms the basis for differentiating objects using different bands in remote sensing?
What forms the basis for differentiating objects using different bands in remote sensing?
- The distance of the objects from the satellite
- The size of the objects
- Unique characteristics of absorption, transmission, and reflection for different wavelengths (correct)
- The color of the objects
What is re-radiated by the object in remote sensing?
What is re-radiated by the object in remote sensing?
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How do different objects respond to the same wavelength in remote sensing?
How do different objects respond to the same wavelength in remote sensing?
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Study Notes
What is Remote Sensing?
- Remote sensing is the acquisition of information about the Earth's surface through the detection and measurement of radiation reflected or emitted by the Earth's surface.
Interactions in Remote Sensing
- Electromagnetic radiation (EMR) interacts with objects on the surface of the Earth in remote sensing.
Basis for Differentiation
- The basis for differentiating objects using different bands in remote sensing is the unique spectral signature of each object.
Re-radiation in Remote Sensing
- The object re-radiates the electromagnetic radiation it absorbs, which is then detected by remote sensing devices.
Object Response to Wavelengths
- Different objects respond differently to the same wavelength in remote sensing due to their unique physical and chemical properties, resulting in varied spectral signatures.
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