Question

The scientific principle involved in radio and Television
a) superconductivity
b) propagation of electromagnetic wave
c) electromagnetic induction
d) amplification of population inversion​

Answer 1

The scientific principle involved in radio and television is the propagation of electromagnetic waves.

Explanation:

• The transmitter  produces a television signal from the  audio and video signals.

• This TV signal  is broadcasted by an antenna as an  electromagnetic wave of an assigned  frequency range or channel for that  station. A television antenna picks up  all broadcast signals that reach it.  

• These signals produce electric current within the antenna inside the TV.

• The  tuner selects the desired broadcast  signal.

• Other parts of the receivers  separate the audio signal and send it to  a speaker system.

• The video signal is  divided into three signals into primary colors.

• Thus, we get to view scenes on television.

Answer 2

Answer:

EM WAVE

Explanation:

PRINCIPLE INVOLVED IN USE TV BRODCAST IS EM WAVE