(A) : The sky waves are not used in the transmission of television signals.
(R) : Sky waves are mechanical waves.

What are mechanical waves ?

Mechanical waves are

Why are sound waves called mechanical waves ?

Sky wave propagation is used in

When a sky wave is reflected on to the ground

Would sky waves be suitable for transmission of TV signals of 60 MHz frequency?

(A) : Transverse waves are not produced in liquids and gases. (R): Light waves are transverse waves.

Why is the transmission of signals using sky waves restricted to frequencies upto 30 mega hertz?

(A): It is necessary to use satellites for long distance T.V transmission (R): The television signals are low frequency signals.

(A) : The microwaves are better carriers of signals than radio waves. (R) : The electromagnetic waves do not require any medium for propagation.