31. Eq. 36-14 gives the Rayleigh angle (in radians): 1.22RDdLλθ==where the rationale behind the second equality is given in Sample Problem 36-3. (a) We are asked to solve for Dand are given λ= 1.40×10−9 m, d= 0.200×10−3 m, and 32000 10 mL=×. Consequently, we obtain
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