Elements Of Remote Sensing
If electric permittivity and magnetic permeability of the medium are respectively ‘ε’ and ‘μ’, then the velocity (Cm) of the electromagnetic wave in the medium is given by:

Cm = 1/√8 μ
Cm = 5/√εμ
None of these
Cm = 1/εμ

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

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

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