just as light is electromagnetic wavdes of differing frequencies, the frequency determining the color, sending light through free space dosnt cause mixing of the colors or modification of the colors. introducing intremodulation or mixing is like using a prism to break up the light into its different colors, allowing them to combine differently. radio waves are transmitted on specific frequencies, and arive at all recievers unchanged, except for atmospheric changes such as, selective fading, path loss, multipath distortion and such. then it is up to the reciever to select the signal from all those coming in from its antenna.

 

i am beginner to this subject,please help me to understand how the rf waves overcome all other signals present in the atmosphere and reach receiver,in so many attempts in search of this topic i have read that 2 signals having different frequencies do not interfere,but how is this possible?give me any real time analysis.

If you are at a party or other social gathering, you may hear one voice you recognise amid the general hubub. It's the same with RF signals.