Physics
When a vehicle passes, TV reception gets distorted. This is because

Modern vehicles use electroignition system
Vehicle pollution affects the performance of the TV components
Metal reflects radiowaves
Spark plug creates electromagnetic disturbances

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Physics
In total internal reflection, the light travel from

Rarer to denser medium and it occurs with no loss of intensity
Denser to rarer medium and it occurs with loss of intensity
Rarer to denser medium and it occurs with loss of intensity
Denser to rarer medium and it occurs with no loss of intensity

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