Question

A beam of fast moving alpha particles were directed towards a thin film of gold. The parts $A^{'},\mspace{6mu} B^{'}$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.

• A. $B^{'}$will be minimum and in $C^{'}$maximum
• B. $A^{'}$will be maximum and in $B^{'}$minimum
• C. $A^{'}$will be minimum and in $B^{'}$maximum
• D. $C^{'}$will be minimum and in $B^{'}$maximum

Answer 1

Answer: (B)

$A^{'}$will be maximum and in $B^{'}$minimum

Answer 2

Because atom is hollow and whole mass of atom is concentrated in a small centre called nucleus.