Elements Of Remote Sensing
Pick up the important characteristic of a target which facilitates its identification from the following:

Temporal variation
All of these
Spectral variation
Spatial variation

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Elements Of Remote Sensing
Which one of the following statement is incorrect regarding the electromagnetic radiation?

The oscillation of charged particles sets up changing electric fields
These are produced by the motion of electric charge
None of these
The changing electric fields induce the changing magnetic fields in the surrounding medium

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