Television signals cannot be received ordinarily beyond a particular distance due to ______?
ٹیلی ویژن سگنلز عام طور پر ______ کی وجہ سے ایک خاص فاصلے سے زیادہ موصول نہیں ہو سکتے؟
- Absorption of signals in the air
- Weak antenna
- Curvature of earth
- None of these
Explanation
- Television signals cannot be received ordinarily beyond a particular distance due to the curvature of the earth.
Key Points
- Signal waves travel in a straight line from the transmitting antenna to the receiving antenna. The signal transmitted from a TV tower cannot be received beyond a certain distance because the surface of the Earth is curved.
- This is due to, after going a certain distance the frequency of television signals decreases while their wavelength increases.
- Signal waves transmitted from a transmitter get absorbed or blocked by the curvature of Earth and are not received.
Additional Information
- Signal:
- Information converted in electrical form and suitable for transmission is called a signal.
- Signals can be either analog or digital.
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