Question

Computers and other communication devices can be connected a network using wireless technology. 

1. A song is transferred from mobile phone to a laptop using this technology. Name the transmission medium used here.

 2. Explain any other three communication media which use this technology

Answer 1

1. Blue tooth or Radio waves 

2. Wireless communication technologies using radio waves 

(1) Bluetooth: This technology uses radio waves in the frequency range of 2.402 GHz to 2.480 GHz. And transmit data in short distance. Mobile phones, Laptops, tablets etc use Bluetooth technology to transmit data. 

(2) Wi Fi(Wireless Fidelity): It uses radio waves to transmit information across a network in a range 2.4 GHz to 5 GHz in short distance. Nowadays this technology is used to access internet in Laptops, Desktops, tablets, Mobile phones etc. 

(3) Wi MAX(Wireless Microwave Access): It uses micro waves to transmit information across a network in a range 2 GHz to 11 GHz over very long distance. 

(4) Satellites: By using satellite we can communicate from any part of the world to any other. The ground stations are connected via the satellite. The data signals transmitted from earth to satellite (uplink) and from the satellite to the earth (downlink).