Give (brief) reasons for the following : (a) We use the ‘sky wave’ mode of propagation, of electromagnetic waves, only for frequencies up to 30 to 40 MHz. (b) The LOS communication, via space waves, has a (fairly) limited range. (c) A mobile phone user gets an ‘uninterrupted link to talk’ while walking.

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Give (brief) reasons for the following :

(a) We use the ‘sky wave’ mode of propagation, of electromagnetic waves, only for frequencies up to 30 to 40 MHz.

(b) The LOS communication, via space waves, has a (fairly) limited range.

(c) A mobile phone user gets an ‘uninterrupted link to talk’ while walking.

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