In Rutherford experiment the number of a-particles scattered through an angle 60° is 112 per minute, then the number of αα particles scattered through an angle of 90° per minute by the same nucleus is :

In Rutherford experiment the number of a-particles scattered through a

1.	In Rutherford experiment the number of a-particles scattered through an angle 60° is 112 per minute, then the number of αα particles scattered through an angle of 90° per minute by the same nucleus is :
A.	28 per min
B.	112 per min
C.	12.5 per min
D.	7 per min
Answer» B. 112 per min