A classical mechanics problem by A Former Brilliant Member

A narrow beam of photons is projected normally on a silver sheet of thickness d = 1.0 μ d=1.0\mu m with a velocity of

v = 6 × 1 0 6 v=6\times 10^6 ms 1 ^{-1} . What is the probability that the photons scatter into rear hemisphere ( θ > 9 0 ) ? (\theta >90^\circ) ?


The answer is 0.006.

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