Question

Why do the pictures obtained on TV shake when an aeroplane pass from above at low height???

Answer 1

Since the aircraft is moving, this interference pattern thus produced is unstable, which results in the shaking if the TV image.

Answer 2

In the modern days,we use wireless network systems vastly in our daily lifestyle.

Modern television broadcasting system also works on the wireless network system,in a frequency range of 50MHz to 850MHz.

Aeroplane network system works in 123MHz which interferes into the TV networks.

That's why TV pictures shake while an aeroplane passing in a low height,due to the frequency range interference.