Correct Answer - Option 2 : Infrared
Explanation:
Remote sensing survey:
It is the art and science of obtaining information about an object or feature without physically coming in contact with that object.
Energy in remote sensing deals with the infrared region of the electromagnetic spectrum (EMR)
The entire EMR is divided into seven regions.
- Gamma rays
- X-rays
- UV rays
- Visible spectrum
- Infrared
- Microwave
- Radiowave
Advantages of remote sensing are:
- Remote sensing provides data on large areas.
- It can be used to obtain data of very remote and inaccessible regions.
- With the help of remote sensing imagery of any area over a continuous period through which any natural changes in the landscape (earthquake) can be analyzed.
- It is relatively cheap when compared to employing a team of surveyors.
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Easy and rapid collection of data.
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Rapid production of maps for interpretation.
