Wave motionHard
Question
An X-ray tube with Cu target is operated at 25 kV. The glancing angle for a NaCl. Crystal for the Cu Kα line is 15.8o. Find the wavelength of this line.
(d for NaCl = 2.82
, h = 6.62 × 10-27 erg-sec)
(d for NaCl = 2.82
, h = 6.62 × 10-27 erg-sec)Options
A.3.06
B.1.53
C.0.75
D.None of these
Solution
According to Bragg, S law ⇒ 2dsin θ = nλ n = 1 for first order
⇒ 2 × 2.82 sin 15.8 = λ = 5.64 × 0.2723
= 1.53
⇒ 2 × 2.82 sin 15.8 = λ = 5.64 × 0.2723
= 1.53
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