In the Rutherford scattering experiment, the number of α particles scattered at an angle θ = 60 degrees is 36 per minute. The number of α particles per minute scattered at angles θ = 90 degrees is (As

Question

In the Rutherford scattering experiment, the number of α particles scattered at an angle θ = 60 degrees is 36 per minute. The number of α particles per minute scattered at angles θ = 90 degrees is (Assume all other conditions to be identical.)

Prashant Kotian · Accepted Answer

Correct answer: B. N ∝ 1/sin^4(θ/2). N(90)/N(60) = [sin(30)/sin(45)]^4 = [(1/2)/(1/√(2))]^4 = 1/4. N(90) = 36/4 = 9.

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