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Question

If number of scattering particles are 56 for 90 angle then the number of scattering particles at 60 angle will be

A
224
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B
256
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C
98
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D
108
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Solution

The correct option is A 224
Using Scattering formula
N1sin4(θ2)N2N1=sin(θ12)sin(θ22)4N2N1=[sin(902)sin(602)]4=[sin45sin30]4=4N2=4N1=4×56=224

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