Answer the following questions:
(a) When a low flying aircraft passes overhead, we sometimes notice a slight shaking of the picture on our TV screen. Suggest a possible explanation.
(b) As you have learnt in the text, the principle of linear superposition of wave displacement is basic to understanding intensity distributions in diffraction and
interference patterns. What is the justification of this principle?
(a) The weak radar signals from the aircraft interfere with the TV signal received by the antenna.
(b) This is because superposition follows from the linear character of a differential equation that governs wave motion.
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