Baly, E. C. C. (Edward Charles Cyril), b. 1871 · London, Longmans, Green · leaf 201
les ofdiffraction QAC, QBC are equalto 6 and 6 + dO respectively.Let us further denote the anglesat P, C, and Q by the letters x,y, and s, then in the two tri-angles PAE and CBE x + i= y +i + di, and similarly inthe triangles CAF, QBF y + 6 = z + e + do, therefore di = x — yand dO = y — z. Now, if… … Fig. 66. — cos = o. By substitution of the values found above for di and dO, wehave—■ cos i{x — y) — cos 6(y — z) = o.By putting AP = /-, AC = p, AQ = s, and AB = b, we have— b ■ b ^ b . X = -cos t,y=- and z = - cos b. r P ^ By substitution of these values in the last equation we have— jb cos i…
Spectrum analysis
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