Question

In triangle ABC,angle B=90° and BD perpendicular to AC, (A-D-C).If AB=6cm,AC=9cm,therefore AD=?​

Answer 1

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Answer 2

The hotter air is lighter (less dense) than the cooler air above it, and has a refractive index slightly less than that of the cooler air. Since the physical conditions of the refracting medium (air) are not stationary, the apparent position of the object, as seen through the hot air, fluctuates.