TV programmes can be transmitted all over the world, with the help of ______
a. geostationary satellites
b. space wave propagation
c. ground wave propagation
d. longitudinal waves
1
a only
2
a, b and c
3
a and c only
4
d only
TV programmes can be transmitted all over the world, with the help of ______
a. geostationary satellites
b. space wave propagation
c. ground wave propagation
d. longitudinal waves