Can you solve this question For me? I need it as soon aspossible.It is question

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Can you solve this question For me? I need it as soon aspossible.It is question 1 Post online if you open this websitehttp://www.physics.carleton.ca/~kalyniak/phys2604/Ass8_2009.pdf.

1. An x-ray tube with a copper target is operated at a potentialdifference of 25 KV. The glancing angle ( in ourdiscussion of Bragg scattering) for first order constructiveinterference with a NaCl crystal for the Cu K line isfound to be 15.8o . The planar spacing of NaClis 0.282nm.
Find the wavelength of that K line.
What is the short wavelength limit for this x-ray tube? (Hint:Recall the mechanism of the inverse photoelectric effect and theresulting Duane-Hunt rule for x-ray tubes.) Find the first orderglancing angle () for photons at the short wavelengthlimit.

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Explanation / Answer

1) From the Bragg's law         2d sin =m The wavelength of the x-rays is              = (2d sin)/m Here m =1          d =0.282*10-9m           =15.8oSubstitute the values for . The wavelength limit for this x-rays tube is             = (hc)/(eV) Here V = 25*103 V            e =1.6*10-19C            h = 6.625*10-34Js            c =3*108 m/s Substitute the values for .    From the Bragg's law       2d sin = The glancing angle for photons at the short wavelength limitis                  =sin-1[/(2d)] Substitute the values for .

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