Elements Of Remote Sensing
Spatial variation in horizontal and vertical directions is caused due to:

All of these
Biological weathering of rocks
Chemical weathering of rocks
Physical weathering of rocks

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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
The changing electric fields induce the changing magnetic fields in the surrounding medium
None of these

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