Q.

A beam of fast moving alpha particles were directed towards a thin film of gold. The parts A', B' and C' of the transmitted and reflected beams corresponding to the incident parts A, B and C of the beam, are shown in the adjoining diagram. The number of alpha particles in

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a

A'will be maximum and in B'minimum

b

C'will be minimum and in B' maximum

c

 B'will be minimum and in C' maximum

d

A' will be minimum and in B'maximum

answer is B.

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