The maximum range of propagation in this mode depends on
(i) transmitted power and
(ii) frequency (less than a few MHz) of high frequencies the rate of energy dissipation of the signal increases and the signal gets attenuated over a short distance.

i) The TV signals are frequency modulated. The transmission of TV signals cannot be obtained the ground wave propagation, as such signals get absorbed by ground due to their high frequency.
ii) TV signals cannot be transmitted via skywave propagation as the ionosphere is unable to reflect radio waves of frequencies greater than 40 MHz.
iii) Therefore, the only way out for the transmission of TV signals is that receiving antenna should directly intercept the signal from the transmitting antenna.

i) Search engine: The search engine is basically a web-based service tool used to search for information on World Wide Web.
ii) Communication: It helps millions of people to connect with the use of social networking: emails, instant messaging services and social networking tools.
iii) E-Commerce: Buying and selling of goods and services, transfer of funds are done over an electronic network.

i) FM requires a much wider channel.
ii) FM transmitters and receivers are more complex and costly.
iii) In FM reception, less area is covered compared to AM.

(i) Noise level is high
(ii) Low efficiency
(iii) Small operating range