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(a) Describe briefly how an oscillating charge can produce an electromagnetic wave propagating

      through space.

(b) Which part of the electromagnetic is spectrum is used in satellite communication?    (3 marks)

Explanation:

(a)   An oscillating charge produces an oscillating electric which in turn, produces oscillating magnetic

        field. The oscillating electric and magnetic fields thus regenerate each other, as the wave 

        propagates through the space.                                                 (2 marks)

(b)   Radiowaves: Wavelength range >0.1 m                                              (1 marks)

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